Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ddccadad6cd392…

MALICIOUS

PDF

78.6 KB Created: 2021-09-05 00:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1478ac47a7d42572465aa2e80b1c2e3b SHA-1: 454de8f913618fa7bcf169824124283272ba7734 SHA-256: e6ddccadad6cd392dcde2575704c7993f3a03d68073f6068b6140be1a8e27730
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting a malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.2287

Heuristics 6

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://huntic.ru/uplcv?utm_term=color+symbolism+in+literature+pdf PDF link annotation
    • https://asi-filter.pl/files/file/14141510031.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/fogolanazajozibujigelew.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/vivogagugazakopofiwomivam.pdfIn PDF document text
    • http://email-database.info/userfiles/file/98149926152.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ssspvg6fquamask1fcnbg4q6ri/65951243251.pdfIn PDF document text
    • https://luminex.pl/upload/file/kedunosefipobedutawirodiw.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/62ead659fa24ad113f65e4fc5b0a8918/dibesoduzadatezakol.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/25923903061.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7ee2c973d---vuxali.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2de8aab81b---wulitu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vj226p0k0i1rpah4nev1hl1936/28064160625.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/najolewujoke.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/70263385245.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b6f0b0ffe---vojarepomediziwor.pdfIn PDF document text
    • http://lucann.com/Upload/file/40743460156.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/91223077038.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070a8708efef---fegaviguvitizi.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/1b17811a4116d7980ff457a2426c6eef/58063361073.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/popugo.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/tusorakimudodugef.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/23dc3c72734a5226e0b5a3ad9d6d7f0b/pogudarubagezis.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/gubese.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c92387cce---16350476713.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45597ed56fe89a2a834dcf6fedf96611/89554508895.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b322e37cc---rozojed.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd9a95b24b---vabuxinowojo.pdfIn 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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 17988 bytes
SHA-256: 73f93172419141f47ae1dcc7697ff603d573bdd6d6ad1557841d0a695630038e
font_01_sfnt_off00010b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001235d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235D 11044 bytes
SHA-256: 2198aa13adc83d3ed2c002698497d4175d7fdf6016b2be19597d9b2d95af02fa

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