Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2b3e4361f3962d…

MALICIOUS

PDF

100.4 KB Created: 2020-11-19 18:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ea15198b6135ebcd1bb69dc3ffce5d44 SHA-1: ea5dce136570060e90fe84b32ee8ebca55a17116 SHA-256: 0f2b3e4361f3962d0457bade258ef6532c53dc0c8adfb42e22051f227c736105
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to other PDFs hosted on platforms like Weebly, suggesting a link farm or SEO manipulation tactic. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution vector. No scripts were extracted, but the primary attack pattern involves directing users to external malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=interpreting+independent+samples+t+t PDF link annotation
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/2853653.pdfIn PDF document text
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/xakasik-bowemamoridiban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f9069008e113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5f9102ecc3ba2.pdfIn PDF document text
    • https://peturenu.weebly.com/uploads/1/3/4/4/134401199/rezolidifugojuw-tomowisejupi-vataxojomuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5fac449b53a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_5f97cfc715123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5fb40786779d9.pdfIn PDF document text
    • https://zobejonimofov.weebly.com/uploads/1/3/4/3/134354570/023a72fc50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf1c29d-7fce-47d8-b481-321474a7e131/harry_potter_7_part_1_streaming_vf.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/2014_mustang_v6_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/gukemumozeku.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/99559440012.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/tata_group_annual_report.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D35 5216 bytes
SHA-256: 33d7af9bfceaf526bc75823d270b7d50fa5687db5ed06a57f1110832dd552dd0
font_01_sfnt_off00013edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDC 14672 bytes
SHA-256: 46ccea31379a8331e92519c7b594d2c4d61407a5dd71e349b222ef6b01a899e6
font_02_sfnt_off00016d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D44 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7

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