Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4773a6adf1d654…

MALICIOUS

PDF

95.1 KB Created: 2021-03-27 14:29:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f26a5ae22eeed6ee4086c109f653d99a SHA-1: d6168ce610fbea760790445f372aaffb4b43fade SHA-256: ee4773a6adf1d654758154fb869b6162ff13046e5ad9d737013f2497a6f304e0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs and is flagged by heuristics as a link farm and a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a product manual, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 https://seumenha.ru/award?keyword=bose+qc+35+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd6397613c62.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/4161873.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/6iejaja/lesser_emerald_spellstone_hearthstone.pdfIn PDF document text
    • http://repuvotase.iblogger.org/xuraxutomutowiguxedib.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/kabog.pdfIn PDF document text
    • https://pigijolewafa.weebly.com/uploads/1/3/4/2/134235355/dovefateru.pdfIn PDF document text
    • https://wakolixib.weebly.com/uploads/1/3/4/7/134706528/fupemizusoj-zilodifuxu-kakagexewa-netimevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490519/normal_5fd958ce24a7f.pdfIn PDF document text
    • http://zujewap.mygamesonline.org/37070489859.pdfIn PDF document text
    • http://joberorerorepi.iblogger.org/xokavewakuluvo.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/fhiiagi/wizard_of_oz_characters_halloween.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_602f45de563ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_6047e4bf16f43.pdfIn PDF document text
    • https://cdn.sqhk.co/wolonevavaru/pfxgfLZ/nba_2k20_ps4_pro_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_604512f18dc2d.pdfIn PDF document text
    • http://xasanefajisa.sportsontheweb.net/78552644827.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/disiropaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/mixagumidis/giifutf/memorial_service_outline_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terumalok.atwebpages.com/javascript_display_byte_array.pdfIn PDF document text
    • http://rowomasogig.epizy.com/12969816548.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://scripts.sil.org/OFLIn 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_off000119b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 5668 bytes
SHA-256: 0626da4384749595e6788f4a4df6486249d977c73f90d65dc4e6d2d76e3925be
font_01_sfnt_off00012cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFC 14736 bytes
SHA-256: a6f74187cc46c4a46fc29c81803d70b8f9830f05586513324b10f6e90eb548ae
font_02_sfnt_off00015abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ABE 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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