Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa9425543821036…

MALICIOUS

PDF

78.2 KB Created: 2021-01-05 16:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8e27cb365f2d0464793bd7c4fe640578 SHA-1: ba94d5af3561f5c1dbe349fed25b4d2f0ffe5def SHA-256: 8fa9425543821036560be04eb01e3c380aa6dbf3086fd8bd0e1731e6fbd546ea
244 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, and contains numerous links to external websites, indicating it functions as a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://traffking.ru/123?utm_term=patry+black+clover'. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=patry+black+clover In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5fc214e117549.pdfIn PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/ketezunu_tubefeka.pdfIn PDF document text
    • https://lotozuxefad.weebly.com/uploads/1/3/4/3/134316708/7930429.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/5812036.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/desunojewavo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5fe58e7c7631a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fb992e21e2bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369323/normal_5fdd35a1c2832.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/Tghhhgj/classic_cars_for_sale_by_owner_in_georgia.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/vesadebupute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5f9969aa75b57.pdfIn PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/jivurazoginura.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/8b6c19268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5febed7129640.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/f2c11d43-3c97-4cf9-b26a-8f9529128e41/starbucks_coffee_passport_notes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 3100 bytes
SHA-256: 6c36ae97883ef42f0bcd9e81ecf602fed03f2a079d1e15667c6d59a2d4691021
font_01_sfnt_off0000f826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 4984 bytes
SHA-256: 42c88aa76e3f4f5f0fc84247386c8d295eb946f9ee7888ef5f240868d4ac6bac
font_02_sfnt_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 10300 bytes
SHA-256: c21093c38a7a4104b3d356fb2651d950ec8db9942909b1c73a53607e8f057272

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