Malicious PDF — malware analysis report

Static analysis result for SHA-256 24827fa4c03ba4bb…

MALICIOUS

PDF

67.0 KB Created: 2020-11-10 00:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2ed0d139a579e7f965c190eb09d4cadf SHA-1: da4bc1650e0da66bc4ab666d62985281f4d4034e SHA-256: 24827fa4c03ba4bb59b0967e3eb8f0795d52a23ec4668e6c6d68389f47da6ba0
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or scam attempt. It contains multiple external URIs, with a primary one pointing to 'trafffe.ru', suggesting it redirects users to a potentially harmful site. The document's structure and numerous links to disposable hosting services indicate it functions as a link farm designed to obscure the ultimate destination. While no scripts were explicitly extracted, the PDF's nature and the presence of external links strongly suggest an attempt to redirect users to malicious 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 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://trafffe.ru/strik?keyword=bmw+z3+hardtop+roof PDF link annotation
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/vamefuxuxufib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fa673ff447ca.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/5437265.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/bozakuluguku_zuzozotunofem_kopenifev_fuxijirun.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/9652302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5fa9bf2a0d14f.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/ximugudekewiwasoba.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/a9864de4-f966-4dcd-87d0-bd5a3cb5435f/25995089144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dd969b-fcaa-404e-a088-56d1cd046317/xuxirukuwoxunekijujiv.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/word_bank_writing_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e8a49c-5945-4612-879f-adf267906a68/the_wilsonian_moment_refers_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7be15ea-1a8c-4b73-acec-9f790be194df/voxeferuvugufakugugo.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_off0000c9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A8 5428 bytes
SHA-256: f4e3b0f9dac19961bc693c74e437321eed8c7e8c43a75d659fa6008076173514
font_01_sfnt_off0000dc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC12 10536 bytes
SHA-256: 0fbd17a8190385b92a834ac6752ef8c285b427bbb792fe9151043b27c40cf9c2

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