Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c89bdb3fe986fb6…

MALICIOUS

PDF

98.6 KB Created: 2020-12-17 09:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45b74a570bdcb898aff651d26153e920 SHA-1: d43d17a2bc7bc6215fd4c7c4b407c846c9eb3f05 SHA-256: 6c89bdb3fe986fb64d3b0ce87e6709a97b1180881b634b72f405a5bef3bdb612
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to various sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://traffine.ru/123?utm_term=chapter+26+campbell+biology+reading+guide+answers
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f9f98ebe56a7.pdf
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5fb81ecb3d32c.pdf
    • https://cdn-cms.f-static.net/uploads/4475727/normal_5fd3ddb9bcf65.pdf
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/xipadu.pdf
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd36a3244298.pdf
    • https://cdn-cms.f-static.net/uploads/4498971/normal_5fb5b5b6b59bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cd77f231-a871-4d1a-9ce6-5882198be5a4/91006562587.pdf
    • https://uploads.strikinglycdn.com/files/bd20e40c-73db-4c9a-bdba-4a0763d43f89/vejavijetirunotuzizefew.pdf
    • https://static1.squarespace.com/static/5fc77d2aeddbb05c6895727f/t/5fcd0629662d5e24e0a5f910/1607271977756/twitter_logo_vector_free.pdf
    • https://static1.squarespace.com/static/5fc6db42504bb4653ce19d0c/t/5fd62606154d727871e3ea4c/1607869958383/lagu_ost_about_time_yesterday.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf61159ee0f32b874b6fe6/1606377751081/54910708870.pdf
    • https://uploads.strikinglycdn.com/files/361ee8cf-3e19-4350-861a-3c18574d55aa/panasonic_dmr-ez47v_error_code_f60.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a9f.bin
3db54835073c913c24c79501dba8f4483bdda525a5ce3f447d275e43748c248d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9F 6012 bytes
font_01_sfnt_off00014eed.bin
f3f1156433f07cbcd2613c1bd636b864e8581fbc6388c717c5c7285e0f3daede
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EED 2048 bytes
font_02_sfnt_off000157cf.bin
8f86cd1709d77dde2b645d591f888693fe96d55cf19b9e3ad9fcccaa9549a1ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x157CF 10808 bytes