Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52ca2afa33e166d…

MALICIOUS

PDF

88.5 KB Created: 2021-08-07 08:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 756d0c3ba8e31868cfd33df3dd260645 SHA-1: ed105454268f8d49bef6f7309b42b7f9d00e5fbb SHA-256: e52ca2afa33e166dfe82c0d2e22d175c0c3fba870229584c776ea97b24cdffb8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable domains, suggesting an attempt to distribute further malware or phishing content. The presence of a link farm on disposable hosting further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8ecb73522b08a7f55d930c2c068cfd48/lezakidizutubesewetebolu.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1rqm0qbioi2gac33dg51sqkqq4/83542112465.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609048a283500---wixekizegikozumimomopama.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/483becdb93c7f5a6f3d2a580cd46e000/30441688190.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbac8281b9c---zototu.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4ecfa1dbb---pajemevebuterezefizel.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/b60f75d90ecb13e7670051894706fa80/jezuvafo.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gmhajkkqh2km8e0kvp7va1dhl7/jovisefukutozopubupuzemu.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/pewapumotolugid.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/toxanadeziruzidexelura.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/lufododojopopidobuz.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/62369713000.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/reputiju.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c1ac3737610c2216b5bb98294dfea35b/67236333382.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/sovokasoxixaludenikifix.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nqu5fvji2nvqdg5pov6ajrk9aj/kijeweganakoguverodeni.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/92797079079.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c5ea78726---77307285299.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/9823419797.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/vuberanerarumejotawal.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/vemakowawikifi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8654ec3d2---gawoxivo.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094c153d6472---mufuvusanekupok.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/dasuganokowepaleve.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/bekanunaba.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9b21807cc7c1771e3b14147d5224d610/95064760395.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=google+play+store+%C3%BCcretli+kitaplar%C4%B1+%C3%BCcretsiz+indirmePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 11400 bytes
SHA-256: 24a746bbf1bb615ba08b46d4f76078340dadbf3fc6d5776c1558c1ea545a7e2d
font_01_sfnt_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 18620 bytes
SHA-256: 1512504c14918a12c11d21a980ccadea0f124d0f926746716154c21034b2bbd9
font_02_sfnt_off00013976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.