Malicious PDF — malware analysis report

Static analysis result for SHA-256 39191f57db739eb7…

MALICIOUS

PDF

116.0 KB Created: 2020-11-24 22:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 385f925c14b1c53560e5c63a101f5fea SHA-1: ea1c4398757aa9fb71abf84372dcf3b3700dc86e SHA-256: 39191f57db739eb72a4e866324c0667a7eeb6b712e45c4b0beb979def74592f9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to generate traffic or distribute malware. 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

  • 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/strik?utm_term=2019+election+results+uk PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/8363686.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/ritanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f88abc1677fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5f99d6fcded03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459936/normal_5fabaaeeb26b3.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fadf80660a70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f9f833645968.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/9e818a5f-2623-41ad-b09c-2f728922d83f/nrp_test_answers_lesson_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/texejume.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/gegokiwoj.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/td_apps_online.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_off000173aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173AA 5036 bytes
SHA-256: 156897ed569774f6541b1f44be306e684a8aa9c60811595bc96eb48a4387d18f
font_01_sfnt_off000184e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E0 11504 bytes
SHA-256: 5de4580c8bccd0e76102e06538f9c795f7c95356ff49e23f63ab8a6240fb6877
font_02_sfnt_off0001ac2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC2C 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

Open this report in the interactive analyzer, or submit your own file for analysis.