Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cadb67af2c5e0db…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 14:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 47e4e60bc44a1ba21fd0f937eed3ec54 SHA-1: da1ffbe526802625863af715eb4b2006c34b620e SHA-256: 5cadb67af2c5e0dba13bdfc5d0cafaf59a7b1e179186a01f535597528ef78145
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to disposable hosting and link farms, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to external URIs and appears to be part of a lure.

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://gimoguvi.ru/123?utm_term=is+the+movie+narnia+on+netflix+canada PDF link annotation
    • http://comforfemj.fun/83361733408h1eq3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_60218debc89cb.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/12426894989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387571/normal_5fcb4637b2586.pdfIn PDF document text
    • http://xakavewazoxejef.22web.org/bow_and_arrow_images.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5ff8ab759eca0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5fc575f8ee0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_601716a9dde5a.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/5019898.pdfIn PDF document text
    • http://appless.space/esperanza_rising_spanish_versionlfhja.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/nurugimazojuvupij.pdfIn PDF document text
    • http://idealsit.space/tefukameruvata8n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gilaniborifavap.epizy.com/how_to_fix_bowflex_max_trainer_m5.pdfIn PDF document text
    • http://tizosife.rf.gd/diwefudozez.pdfIn PDF document text
    • http://wadarudi.epizy.com/introduction_to_trigonometric_ratios_ppt.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_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 5324 bytes
SHA-256: 83b2a7c75d0ab90bd1e2d186ded32c23bd08cf6e9ee641b5354d73b9bdb0f97e
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 10396 bytes
SHA-256: 7bc2c9ab0288f73657a3eb2db7cb38bf08d7363de519a6e557f33ed2cebc6b23

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