Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fe9709cafced4d…

MALICIOUS

PDF

76.3 KB Created: 2020-12-04 16:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: cdd889b0727f0097d546e6499a87bc6f SHA-1: 57f0b7aa483ba019e1f66a1d06ca167bcfb7161b SHA-256: c5fe9709cafced4d108dc644ec484b8db56d692c8d7ff4c7b0e7ef77e6888adb
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a link farm and an embedded URL, pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to game mechanics, suggesting a lure to attract users to the malicious URL.

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 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.
  • 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://traffnew.ru/123?utm_term=skyrim+level+smithing+enchanting+alchemy PDF link annotation
    • https://zakulupibuwuvos.weebly.com/uploads/1/3/4/6/134686441/zulitesupabusili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5fa31ea78abfd.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/3256396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc532e34347c7043ce2c/t/5fc8a47ee21c7c679ae8a960/1606984831800/i_wish_u_were_here_in_spanish.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60ef3c6ccf69f3562259/1606377712103/divejimemimosekit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc363b5c6d964583631f5aa/t/5fc545259b1ed0353889ff5d/1606763813086/protein_synthesis_concept_map_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b186b014-0817-47f3-b669-3e0e6bf93be6/pimovif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc0747a-cb78-48cf-8cbd-ec80789545ce/denusexonufadag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a5ae27a199023ac0a057/t/5fc58fa83570fb44d1c13de5/1606782889837/59474952439.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/96148989457.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ae99d79364840844502/1606372075413/cast_of_characters_umbrella_academy.pdfIn 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_off0000eab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB1 5540 bytes
SHA-256: 9966a5aaef97f171202de5aeab0ae9d859174e80a166dbd2d6b5d3aaffee696d
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 11148 bytes
SHA-256: ab9fe72000e14b32525e54c54b017e2204f3d41731c1c4e6e5cd8008d2e74382

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