Malicious PDF — malware analysis report

Static analysis result for SHA-256 182e472df7ddf771…

MALICIOUS

PDF

84.1 KB Created: 2021-03-10 01:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 656d05032f52ddb56c7c95bc55bd7e42 SHA-1: 844d512095cd29c51acbc154e0ed2fa7c204424e SHA-256: 182e472df7ddf7713b651ec4062f990a801ffe1339260aeb3afeb3083c20336c
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, with one prominent URL pointing to a domain associated with malicious activity. Heuristics indicate the PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://xezojetit.ru/strik?utm_term=academic+writing+jobs+online+in+pakistan PDF link annotation
    • https://fakebomazeb.weebly.com/uploads/1/3/1/4/131453402/kenevekosumo-rasijitog-nowojokogaz.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/eijgg84/vampires_netflix_2020_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378406/normal_6007b6b14552b.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/5459194.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/6cb82dc40.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/qribBDF/siwinelopufatoveligibeve.pdfIn PDF document text
    • https://dunijolojuk.weebly.com/uploads/1/3/1/4/131437931/xakukafeloma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_5fe2788571ab0.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/MlzegiV/4258822002.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/nNjhEv4/juvabexonefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470542/normal_5fca00f106da8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368971/normal_5fec67430f0d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5ff75f2e5c320.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/447198f8-dc17-45d5-adb4-6b9db3c337d5/xerilorinabanosilepunofon.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/malezojemetikibipefureka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bba770f-1d1d-40dd-ba48-7d89abf6520f/sukhmani_sahib_quotes_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5750ee-c1cc-4106-a3a3-4d3f8323ab22/81226976137.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/outbound_delivery_report_sap.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/dizilip.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/fonugudidomomejumute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eda49e7-4110-4fe1-a80e-ba6c2f5465c4/98432437385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6f438a-4850-4631-96da-b161dd61b808/mefive.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/33496504165.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_off00010bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 5752 bytes
SHA-256: 018076a8015f0305043a645a482bf7404fb2ea9e09cd86e8c4c5f4a860a029c9
font_01_sfnt_off00011f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 10412 bytes
SHA-256: 203d8d2fb687640e7bfb85be720633fabb20f814a52e86389ccdc9882f241ba4