Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b3d1d949576b9e…

MALICIOUS

PDF

63.6 KB Created: 2021-01-08 09:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0f2a57841dd80fcc949ae705cec53d70 SHA-1: 7a9a82ce906af89075e5574af317dc1a501ffe88 SHA-256: 39b3d1d949576b9ee2ab6ed18e3aec2812d5ba09ce91befe468c46791f23f379
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, with many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. One of the embedded URLs, https://traffnew.ru/aws?utm_term=lagu+albi+nadak+ceng+zamzam, is likely part of this scheme. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific content or intent beyond the link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=lagu+albi+nadak+ceng+zamzam PDF link annotation
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/1465252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f9670ca7d280.pdfIn PDF document text
    • https://wubudonujekud.weebly.com/uploads/1/3/4/5/134524452/xukizur_naxasup_wiromixefusug_rasateg.pdfIn PDF document text
    • https://buvawaxeve.weebly.com/uploads/1/3/0/8/130874113/f69add8becd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f933b922f4ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5fcbf7a2a124e.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/135883.pdfIn PDF document text
    • https://xamegazu.weebly.com/uploads/1/3/4/4/134440804/4bd6bf2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_5fbf66e513dad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415754/normal_5fc4ebf656315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tosevud/jose_bolanos_and_marilyn_monroe.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dawisowiluzokezejo.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/21931987098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c0fb4d-29ea-4b40-b613-87a611194a62/7756362173.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_off0000bd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD35 5180 bytes
SHA-256: 2d3835fefad317f81c5d864a606b4f251f99385ec2b1c459e5bcae1f602ab845
font_01_sfnt_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 10452 bytes
SHA-256: 3271ded1044dd4b45331c68050d0a6489b956dcdc5fa5b751fae9327367c92e1

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