Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8f8b42d50c2b87…

MALICIOUS

PDF

80.0 KB Created: 2021-03-16 10:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9daf420340bf59c9187494fd5a9586 SHA-1: b0b9c8b4f1551c3edc825e0630c24abf0fbf3464 SHA-256: bd8f8b42d50c2b87f22476c0f19e6553341bdfa1e795f09cdedd9683757ac424
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content or visiting a phishing site. The PDF structure itself is also noted for duplicate object bodies, which can sometimes be used for obfuscation.

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://pelibifir.ru/wix?keyword=d%2526d+campaign+handout+template
    • http://nexojofe.22web.org/premiere_pro_template_free.pdf
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/23cf1194f0972.pdf
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/ae77c.pdf
    • https://xefomivor.weebly.com/uploads/1/3/0/8/130814633/tepetewujebeber.pdf
    • https://cdn-cms.f-static.net/uploads/4487647/normal_603eeb6f330e1.pdf
    • https://cdn-cms.f-static.net/uploads/4369487/normal_603817fc761f0.pdf
    • https://vigusukababimer.weebly.com/uploads/1/3/4/8/134881512/4096945.pdf
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/badifojekun-nititom-bapidewepo.pdf
    • https://static.s123-cdn-static.com/uploads/4489852/normal_6002641991e3a.pdf
    • http://dokovuxumev.22web.org/can_you_feel_menstrual_cups.pdf
    • https://cdn-cms.f-static.net/uploads/4385853/normal_604e4a785e7e7.pdf
    • https://static.s123-cdn-static.com/uploads/4412584/normal_5fc70fb2b3605.pdf
    • https://cdn-cms.f-static.net/uploads/4490950/normal_6032c2e6757da.pdf
    • https://zegusuvi.weebly.com/uploads/1/3/4/7/134738546/xezubibezajap.pdf
    • https://cdn-cms.f-static.net/uploads/4501989/normal_601974b28a3bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_e47542ecec0c463bba1afffdc5dd447e.pdf?index=true
    • http://teveniwavabubak.rf.gd/kaffir_boy_study_guide_answers.pdf
    • http://zutagokakaki.rf.gd/louisiana_food_stamp_income_guidelines_2018.pdf
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_49289509d56245d58b4fe25e4ac64693.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7f.bin
b6bc3e761eca8ae26333d0367913862b9788f7109bed8a3dd2635371d897bba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 3484 bytes
font_01_sfnt_off0000f9eb.bin
9167826f0d7a0692ab43b52519a2d6d60b3657561eef55a9e9d3b16e9a4e7d84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 13392 bytes
font_02_sfnt_off0001243b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 4324 bytes

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