Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ea1d44b4e844ea…

MALICIOUS

PDF

78.3 KB Created: 2021-04-07 02:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 601c1ed72be7a3e6d6ee63a704e68125 SHA-1: b5f815a26be83086032a8b9c9ffabe7205a3777d SHA-256: 40ea1d44b4e844ea2c0cd2495b9703867227902d88e3751a67b6436d37b2fa0d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The primary URL, https://ponafet.ru/wix?keyword=how+to+dance+in+roblox+tower+of+hell, suggests a lure to a potentially malicious website. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=how+to+dance+in+roblox+tower+of+hell
    • https://static.s123-cdn-static.com/uploads/4367296/normal_6003a7406d9ad.pdf
    • https://cdn-cms.f-static.net/uploads/4460461/normal_6012252125671.pdf
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5fe2dd8c436e9.pdf
    • https://zurukonovode.weebly.com/uploads/1/3/1/3/131379219/9084695.pdf
    • https://rerofijujujedo.weebly.com/uploads/1/3/1/8/131872137/5475343.pdf
    • https://lorajezaked.weebly.com/uploads/1/3/4/3/134367433/9247211.pdf
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5fd24fafd6565.pdf
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/9802188.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vilewol.epizy.com/compliance_with_hand_hygiene_audit_report.pdf
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_d38e3aeb919c45e5a902fb6c2bc1d57b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/836d1f95-93b4-462b-8da1-afbcf872df6a/basic_chinese_language_translation_to_english.pdf
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_55641bed210f4ad3aef2fd3dc804e550.pdf?index=true
    • http://tujiritam.epizy.com/13720821420.pdf
    • https://uploads.strikinglycdn.com/files/ddd32696-77ad-40dc-a832-e050aeacb4f4/pusegomero.pdf
    • http://wokeben.epizy.com/anti_log_table_download.pdf
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_5bb21a4be5b34767be2aec4e67165676.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0f0af7a-7462-4bfc-9d25-ff84ad091b1b/pugele.pdf
    • http://lesizemub.epizy.com/32352626188.pdf
    • http://lomolawowetaxu.rf.gd/19750313830.pdf
    • http://kiwaxebaka.rf.gd/8200108684.pdf
    • https://uploads.strikinglycdn.com/files/0146c9a1-1d6a-4ac3-96c3-2db379cebdb8/john_deere_x360_deck_parts.pdf
    • http://sojoramuf.epizy.com/5620745971.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f3.bin
7502653ea2013d1faaabbbebd61bcb750a8c199dc17c71c53d04ae454866681c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 5192 bytes
font_01_sfnt_off000104ab.bin
f3329de77cdf023e56fe2d8185bfa7fb19b3cc2c73af2d59c545e156ac1a50e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 11428 bytes

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