Malicious PDF — malware analysis report

Static analysis result for SHA-256 1765f1ef979606b9…

MALICIOUS

PDF

67.1 KB Created: 2020-12-29 11:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d10d924020981db2c5bd55648806a543 SHA-1: cc4c9bb1abdf121e98f52a856c20346d3aa4f9e3 SHA-256: 1765f1ef979606b9b594199a91a1ad7d712e8da3c26aacbef24c2f1c193c7c38
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'traffking.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are PDFs, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/strik?utm_term=centipede+game+system PDF link annotation
    • https://levoveto.weebly.com/uploads/1/3/4/8/134897684/fofapefip.pdfIn PDF document text
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/jabef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f87612544926.pdfIn PDF document text
    • https://cdn.sqhk.co/kefesizo/j7icjdw/hp_smart_app_for_apple.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/raxapibomudireze.pdfIn PDF document text
    • https://cdn.sqhk.co/wediximewoza/jfBjegh/bivojupaweruxiwijapeteto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f906b4dbf91f.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/lapaloxadigazi.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/tujeviwakirawu/chrome_os_launcher_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/35193908270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6bb893-7c05-4cea-8aea-f11975d57d2f/nijonokovubuwonow.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/94336543.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/monster_energy_nutritional_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c41983-e0da-4abd-975e-238eba33df3e/the_rock_climbing_training_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA46 5160 bytes
SHA-256: 6ca0dbd38eedaad16a29629e6e234263834a0816b18a6bddecda0c31829bab10
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 10544 bytes
SHA-256: b8e9746b6477bc752373d59bbd9ae605d726f67f36d4c91cba638e962d33f6c2

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