Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4e5d3bd8e68a06…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 22:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 16b63eb3cd693c7e559d04ba40ca2755 SHA-1: 2216ebe0802936f74fc8a30c2f42f03659f61cea SHA-256: df4e5d3bd8e68a068ed7b5204b2a71b041e55dba8c65904baa983645505f47e3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic specifically indicates a pattern consistent with tech support scams or callback phishing, where the document likely prompts the user to call a fraudulent number. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to malicious content or initiate a fraudulent interaction.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/wix?keyword=triton+trailer+parts+superstore PDF link annotation
    • http://juxaxukavaxi.iblogger.org/51336127432.pdfIn PDF document text
    • http://wofeboz.66ghz.com/masikowoluzuvububat.pdfIn PDF document text
    • http://komakukamuduwi.iblogger.org/botitirifenapajir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5fd9e5f5855b9.pdfIn PDF document text
    • https://timivoza.weebly.com/uploads/1/3/5/3/135315173/3068483.pdfIn PDF document text
    • https://cdn.sqhk.co/nisifowisom/7Zgcgdx/20800624446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_5fe99f1d105fe.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/lidutanoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/Uzhbec6/vlad_niki_run.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_602db1955493a.pdfIn PDF document text
    • http://fojegasojabur.22web.org/rowigotulujixesalute.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/c6gfa6i/bingo_blitz_free_bingo_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safoxaw.rf.gd/70559556880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c36ace-392c-493f-9b37-ad124da7a256/xezedezijotujobumun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024f5668-974a-4177-9828-b9fd5ed15512/19740381106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f7e30d-a854-41a6-8460-d5dfe315381d/yamaha_mg166cx_price_in_sri_lanka.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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 4760 bytes
SHA-256: fb77d15056f8e354503ef5152de6538121693b83943133272cd1a5ac84f12145
font_01_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 11340 bytes
SHA-256: 7f9d61ec616ff1aca0ed3308d28bd3e44de32e54f5fee07a8e5c27f08c180a6b

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