Malicious PDF — malware analysis report

Static analysis result for SHA-256 6180e09793f811d6…

MALICIOUS

PDF

78.3 KB Created: 2021-06-02 11:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cbecee6974fd0972281bcaa4d9d80297 SHA-1: b20089995a0c09b99da5b4226d793d366f394667 SHA-256: 6180e09793f811d6d3272cef9457868fff8552c958343bbc112cbf8bd39ac501
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or malware distribution lure, indicated by a large number of external links forming a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://wastran.ru/pbw?utm_term=5.s%25C4%25B1n%25C4%25B1f+matematik+do%25C4%259Fal+say%25C4%25B1lar+test+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485689/normal_606cad6624be1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488592/normal_60224c615dbce.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/1004182.pdfIn PDF document text
    • https://besikedu.weebly.com/uploads/1/3/1/8/131871581/raroxilefogaj.pdfIn PDF document text
    • https://nawixelufa.weebly.com/uploads/1/3/5/3/135317770/jabojasudipuforulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_6057e7b33deee.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/6107039.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4453532/normal_60b3887731900.pdfIn PDF document text
    • https://xeludopoveju.weebly.com/uploads/1/3/4/5/134528604/6101241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_6057bfc6edf50.pdfIn PDF document text
    • https://kelukija.weebly.com/uploads/1/3/4/3/134337818/titimemon_lojatixizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fe7ee08e60a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416805/normal_5ff115ed6a575.pdfIn PDF document text
    • https://zudumatiwa.weebly.com/uploads/1/3/0/8/130873708/woleguresuzulosad.pdfIn PDF document text
    • https://wisefumi.weebly.com/uploads/1/3/4/6/134672277/7044546.pdfIn PDF document text
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/lojalopapu-bedide-xupepe-jiwomo.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4366022/normal_60afe33ddd637.pdfIn PDF document text
    • https://nivojekegup.weebly.com/uploads/1/3/5/3/135322075/fodopimap.pdfIn PDF document text
    • https://nudimulax.weebly.com/uploads/1/3/6/0/136010194/6e9bb80e54b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498834/normal_5fe6aa6db244a.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/ccdf1700-73dd-4464-9042-2bf619d2c123/49539217062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e472d016-1890-4996-ac33-024a202ac6ee/medieval_2_total_war_mods_twcenter.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_off0000d788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD788 5676 bytes
SHA-256: 86ab8b946dce7de456b5f2c92e523f344ea6ebb88df76747a97ebdb73a6705de
font_01_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 13236 bytes
SHA-256: 639c90614c249235d56b17d30bfa0576c91b93c7b3bb611604d012758962bfcc
font_02_sfnt_off00011417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11417 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15