Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3cc10e4d106017…

MALICIOUS

PDF

72.1 KB Created: 2021-03-28 17:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d2667359db55f5f9662643d6d5c166b SHA-1: df3575a3fbcca0c9d8f77908f24ff263fb53db91 SHA-256: be3cc10e4d10601778f96368203e4139e34841f817907fbb9cfb96954bc707b0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a link farm on disposable hosting, with a specific URL pointing to 'soxebez.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the embedded URL is the primary indicator of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://soxebez.ru/123?utm_term=google+3d+map+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451350/normal_60156cd4049cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_601d078493e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_601a57309a116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5fde20f1d6f1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_ff72eabaa43c4033a227b960410fd702.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93db2e8-0b25-45b4-896b-6bb084ad29ae/zimeg.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_8a15887ce83448e5abd2af0009f0bc2e.pdf?index=trueIn PDF document text
    • http://piwalalif.rf.gd/42490225727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916a29d8-652d-4377-8518-0affcdc61672/48829828290.pdfIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_1e5a0edb7fe341c9bec9b4f92d69cf9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0359687-a125-4b92-8477-9dbe6edc6b64/the_river_church_tampa_staff.pdfIn PDF document text
    • https://fc9a8e44-b853-4378-b933-957c6fa9ceda.filesusr.com/ugd/1da781_67b4fb5086e5440bbad687d7e8109e8b.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_229dc5f2ceb44d4fb2b955790b56d063.pdf?index=trueIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_4547e0051eaa40949c5bfb2d6fdbbbcb.pdf?index=trueIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_051945f76cf741eebc268eed0bc22bc3.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_f541c51e865a4b4a89cd6d8d85778d91.pdf?index=trueIn PDF document text
    • http://rozevilamires.rf.gd/caderno_caligrafia_imprimir.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_04c5e4c6179641ec9695ef43168bdb99.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 5376 bytes
SHA-256: bfee64a209128586a6edd030eb735f9e75515fc2c002b796029be9e2751776ce
font_01_sfnt_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 10520 bytes
SHA-256: 2bab6621465d283593be99f014e7fa60ee1581b250d80bd4dc264471a3ca1590

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