Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fcb5d4b628195a…

MALICIOUS

PDF

69.2 KB Created: 2021-02-15 12:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3e0ebe1f5f46f48254957a8bef731ac2 SHA-1: 9c91ab3917bc97754887a134bfca605dcfa3ce8e SHA-256: f8fcb5d4b628195a632ccf4000bf49434535d082918599ab20d224bda47fdecb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to car air conditioning troubleshooting. The presence of numerous external links, including one to 'bologen.ru', points towards a phishing or SEO poisoning attack designed to redirect users to potentially harmful content.

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://bologen.ru/123?utm_term=car+air+conditioning+troubleshooting+guide PDF link annotation
    • http://seplafond.xyz/peter_pan_inglesei9rd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_600a90588a7e2.pdfIn PDF document text
    • http://bigpleasure.ru/jajikafiperotujofokinunfgbs1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461773/normal_60136443aa0fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425933/normal_6007f45bce8eb.pdfIn PDF document text
    • https://xuvurabog.weebly.com/uploads/1/3/2/6/132696285/puniwepurebutebun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5feff862c709c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366959/normal_5fc9b2afe6406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384632/normal_5fe3c1c62192a.pdfIn PDF document text
    • http://tehnotop.store/minecraft_new_mob_vote_2019b6j3m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5ff2f0cb16bd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fe4b13238874.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/vixuwogetiv/60867860176.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_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 5248 bytes
SHA-256: b872d995f8664215e0907357fae2c48aeea87d594dc1020647367ed0f3a4c954
font_01_sfnt_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 9872 bytes
SHA-256: db3e55395b10891ccec255c6df9bafc5711f68e632b38d50d038c67dcfd233c1

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