Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea193deeb5403b75…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 17:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8624be851b00331f05ab678607a4a55e SHA-1: 1afb38551ac6e6717278c22346399805905bef87 SHA-256: ea193deeb5403b752dfb7e5588270bd99e0af514670af3c5a64d21ec5ac378cc
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or scam campaign. It contains numerous embedded links pointing to disposable domains, suggesting an attempt to direct users to malicious content or phishing sites. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or tech-support scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://luxcottage.ru/stroykamen/userfiles/files/80289554385.pdf In PDF document text
    • http://mcserpenti.com/userfiles/file/borurog.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/66862891469.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/51044751892.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/45393192277.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/68730961704.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/52791688777.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/tuvegefabanuvalunojimol.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/91375275530.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614129c814c05---pagozoge.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad27529ac7---sasulal.pdfIn PDF document text
    • https://limsurdua.com/contents/files/paxobikedut.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/90022972268.pdfIn PDF document text
    • http://elsped.hu/files/file/8508218389.pdfIn PDF document text
    • https://network-italia.com/file/35403412122.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/zogenoluxovoz.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/woxubi.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/vaderinodamevetobogirusex.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/xijilit.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/deverugitukojimirojezara.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/vidiwofa.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/33418380663.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/56898417887.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/xowar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=five+night+at+freddy%27s+security+breach+apkPDF 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_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 11256 bytes
SHA-256: 9cbbabb3076976527e6be1a7366e7717b32f32fb12fc20bcfdd783150b92884c
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 18592 bytes
SHA-256: 98713bec008effad161dc13781f757e64f4fd1a5e982e4a2a10b7f5c501d6e0e
font_02_sfnt_off000127f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1