Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3186c47c36c133…

MALICIOUS

PDF

83.9 KB Created: 2021-03-21 21:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ccbce2836654a326e59db10881a2eb SHA-1: efcd41bf3cc04aeb5bbf9008337b7eb540e92104 SHA-256: 6e3186c47c36c133523088cc4688b2f686f78865f21747d2614d8dbee7febb8a
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://resalured.ru/award?keyword=build+your+self+confidence+pdf
    • https://cdn.sqhk.co/gupikekarobo/hQyjgJV/walking_dead_final_episode_review.pdf
    • https://cdn-cms.f-static.net/uploads/4465388/normal_5fdad339c1e74.pdf
    • https://cdn.sqhk.co/fogobewataja/wVhDrgg/43803158911.pdf
    • https://cdn.sqhk.co/fuzokikili/WJghgge/59873867536.pdf
    • https://cdn.sqhk.co/susojareb/CcclijO/rexanijig.pdf
    • https://cdn-cms.f-static.net/uploads/4378171/normal_604aa67c3f398.pdf
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5ff0791aca24b.pdf
    • https://cdn-cms.f-static.net/uploads/4459337/normal_603554c928ff0.pdf
    • https://static.s123-cdn-static.com/uploads/4463034/normal_5ffa3f5fed9c2.pdf
    • https://cdn-cms.f-static.net/uploads/4491945/normal_6032249a29163.pdf
    • https://cdn.sqhk.co/puzadowoke/HtTuThc/rumble_build_guide_s9.pdf
    • https://cdn-cms.f-static.net/uploads/4454299/normal_6050c4d93761f.pdf
    • https://cdn.sqhk.co/gobenebovi/gjhjC1q/run_candy_run_apk.pdf
    • https://cdn.sqhk.co/ninulekuto/hjHgfz9/idle_bubbles_cannon_mod_apk.pdf
    • https://cdn.sqhk.co/woberimi/eX7zGIw/780254681.pdf
    • https://static.s123-cdn-static.com/uploads/4374957/normal_60033a3f7f06d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_94e6ea0234b34c76a9fd7a8e84ed33d3.pdf?index=true
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_d46d6368a88242e39a51c18064ff98bd.pdf?index=true
    • http://kifixawoxo.epizy.com/grade_10_natural_science_exam_papers_and_memos_2017.pdf
    • http://rusapejuvovu.epizy.com/91356220471.pdf
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_ea0783f4f89c436f95deb22a06e31424.pdf?index=true
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_5ffe5dae7b5049eb93ba0f8997a8f848.pdf?index=true
    • http://tagemafizikevu.rf.gd/sojomososupurif.pdf
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_04feedc527cd4d8195032d43ddba30c7.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa3.bin
fff170ccdd7fce70d89fa1345817c735687c1065f3c823932d25bc30ef953bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA3 5092 bytes
font_01_sfnt_off00011c18.bin
4776dbb8c46f29b762dba54b3b0c026f81870bb9667318cd0567271b9388aa0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C18 10728 bytes

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