Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc82cc0dad846511…

MALICIOUS

PDF

81.2 KB Created: 2021-05-13 21:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ef8c01f214b6378ec88d79215acd60 SHA-1: 7ec528fd0e2fb1d37fad95a6dc834f248f6970d2 SHA-256: fc82cc0dad84651127f5ff1bc41cadece37dc09f1d7203e48a068884df015e47
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to meeting minutes and embeds a URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=como+hacer+una+minuta+de+reuni%25C3%25B3n+ejemplo
    • https://static.s123-cdn-static.com/uploads/4393361/normal_5feed7736f690.pdf
    • http://mavixepajifulem.scienceontheweb.net/butunagezufekusefuwujetul.pdf
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fd66e32758b9.pdf
    • http://mokugujumekov.sportsontheweb.net/antecedentes_historicos_diabetes_mellitus.pdf
    • http://famozosivupiwij.sportsontheweb.net/algebra_for_university_students.pdf
    • https://static.s123-cdn-static.com/uploads/4465905/normal_5fe255e4d48c9.pdf
    • https://cdn-cms.f-static.net/uploads/4368768/normal_6055b66bdfea0.pdf
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fc8a4317632a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/697aeb98-c7ab-4af8-8329-d9bd1101e766/twilight_free_streaming.pdf
    • https://uploads.strikinglycdn.com/files/d75c1b36-bde3-4f99-bb69-2d7a88804fcc/lixotali.pdf
    • https://uploads.strikinglycdn.com/files/b6f44b0c-2ccc-44fc-9ca7-01c20c12daf9/zoxadatuxiwetifug.pdf
    • https://uploads.strikinglycdn.com/files/45ab4254-28ac-409d-9735-f1d4180258d4/43304803856.pdf
    • http://gezixus.myartsonline.com/75402775030.pdf
    • https://uploads.strikinglycdn.com/files/3eca1a3f-5ce9-4119-9854-c93f34ae0c97/best_textbooks_on_number_theory.pdf
    • https://uploads.strikinglycdn.com/files/32375525-dc27-4f10-ba08-6b2b4d80dba8/sewizawofar.pdf
    • https://uploads.strikinglycdn.com/files/76e16834-c4d1-4e44-b684-c601124ebb3c/dragon_ball_super_manga_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/7c6d9630-3ad7-417d-a383-a1307426035e/vocabulary_workshop_level_b_answers_unit_2.pdf
    • https://uploads.strikinglycdn.com/files/a651d457-ba74-40b3-85ff-4571a71276d9/oster_turbo_convection_oven_instruction_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f068.bin
485dd785de5edab399e2f9366167c213640a7bba90d6de09dcf792d1b1fafdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 5252 bytes
font_01_sfnt_off000101d8.bin
be3bdb28dff9d76b4d118e1e6633233579d23c050d22e24e332a905fd33f3ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 11388 bytes
font_02_sfnt_off000126be.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126BE 4324 bytes

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