Malicious PDF — malware analysis report

Static analysis result for SHA-256 407b327c497d25fb…

MALICIOUS

PDF

87.7 KB Created: 2021-09-04 14:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1f97975bb81799044bbf0c196bd24de5 SHA-1: 91944417c583ef7636ef0b202d17857366743e30 SHA-256: 407b327c497d25fb938de770bda1702424bdeadbb1a76b89f9f3f653b876e2ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by its classification as a link farm on potentially compromised websites. The presence of multiple external URIs and the ML classifier's high confidence score suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with attempts to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://garglob.ru/uplcv?utm_term=hieros+logos+pdf PDF link annotation
    • https://bomberosdenavarra.com/userfiles_nexo/files/58150626380.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/bimafasejibovivifap.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/0cnmiqigkvhs076d6b0sj0fpg3/78425718197.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a9dab42d371f2404de3f67092238815d/rijesepakid.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/7e05iqch1vdalufk68n77fmq2v/79529429846.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9291ece2f---jezixofab.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aface263b07---zoduzixezuzilovosolesoli.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/womoxupapopixi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c658f5c859b---mopuvatotiwadevaxi.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/13349195683.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/penunifejamezo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607405f351890---kabedewupumajuva.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/wikilaligimibiv.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161012716acec2---35058070524.pdfIn PDF document text
    • http://millecolori.it/images/file/91554756367.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/27331710607.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/titubowamazapulepeki.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ed3cccee6---jafemifonilevi.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608839dc07327---82130189341.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609805d5f1263---kapegufanubopawinu.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/ebb12ac9bd80783e17ea071efef8a460/34592731101.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/nonuzufabixorivusegimun.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/82590055002.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/989956a36205fa14a0c8eb21dd8df876/febivutotuzepememib.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/josizusuzo.pdfIn PDF document text
    • 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_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 21184 bytes
SHA-256: 9b1018ced95612af6a9fb95c6803b938b00e7d407dbe55293b3fce53ed5e9380
font_02_sfnt_off000138d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D4 10300 bytes
SHA-256: ac3fd44ac4b936c776440bac38cddf8340ee8c91901a7f717fa733498770653c

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