Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a481c2fbf1bfd9…

MALICIOUS

PDF

87.6 KB Created: 2021-05-10 22:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0c6c14efaa6585aeb6714a41275ca988 SHA-1: a9456ce21548529e3287f2e43206b276160fa0f4 SHA-256: e3a481c2fbf1bfd9af590081a71037c1552e0f680f2aac9f054449a7c1d1bad7
206 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'Romeo and Juliet' and quiz-related terms, likely a lure to disguise the malicious intent of directing users to a phishing URL. No scripts were extracted, but the presence of embedded URLs and the link farm nature strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=romeo+and+juliet+act+3+quiz+multiple+choice PDF link annotation
    • https://fazapezipomen.weebly.com/uploads/1/3/1/4/131453522/a656f0.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/bAhfic2/alphazero_vs_stockfish.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jhhqnAz/safebetifigakugerima.pdfIn PDF document text
    • http://bnatural.space/watch_dogs_2_performance_modsrd451.pdfIn PDF document text
    • http://callup.today/bariatric_cookbook_australia0u8vq.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/hP1AaJZ/qksms_app_store.pdfIn PDF document text
    • http://like-store.site/rick_and_morty_comica9cc5.pdfIn PDF document text
    • https://xukujeferok.weebly.com/uploads/1/3/4/4/134435440/cd4728e65.pdfIn PDF document text
    • http://priz24.site/mail_anywhere_stampsjt80g.pdfIn PDF document text
    • http://elinekici.online/2006_ford_focus_zx3_owners_manuallabyj.pdfIn PDF document text
    • http://floradoma.net/siruretemjme9p.pdfIn PDF document text
    • https://watowerapomos.weebly.com/uploads/1/3/0/7/130775357/rodekinidid.pdfIn PDF document text
    • http://show-visitor.xyz/manual_de_parts_motor_john_deere_404rcyci.pdfIn PDF document text
    • https://rediwikutine.weebly.com/uploads/1/3/4/0/134096605/mitopafunusigeresuko.pdfIn PDF document text
    • https://tanipodolotuweb.weebly.com/uploads/1/3/4/4/134457000/kiluwasivere.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/bizaruji53v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_2063c91c2809466c968c8cd369ce8afd.pdf?index=trueIn PDF document text
    • https://411563d6-f1a1-4768-9eaa-86e4eb1f1ae3.filesusr.com/ugd/6d8349_a55e8da8483c4288ad0044121d6b045e.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_9050430a645b465cb6eef48641d3788d.pdf?index=trueIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_4f2d7e3bc0f24d778560d598616e1c2f.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_2d0932a0191641cf8e13cdf490222e80.pdf?index=trueIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_b1d0ab16f27643dc994c8357cc53a53e.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 5344 bytes
SHA-256: 02a1f35e0ca5650818a8c77da034ca1d4a093ae8a737c3622001db7a09349d23
font_01_sfnt_off00011798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11798 12012 bytes
SHA-256: 65a0bfa642444dfcd0c3dc06a9613a3fe1ec186c685c410f812058f72ab6dc2a
font_02_sfnt_off0001405e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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