Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afadfa376a73138…

MALICIOUS

PDF

107.2 KB Created: 2021-03-08 06:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3d88ff2416a04361889a779e5d2750d3 SHA-1: 21d2dd3b78aabd0d24030f86a04c675a64e9dcd5 SHA-256: 3afadfa376a7313864a939606a6fe7414ea3e653ccb15c9043ab535e9b83b472
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirect. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily garbled, appears to be a lure related to a search query, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=kuran%25C4%25B1+kerim+meali+ya%25C5%259Far+nuri+%25C3%25B6zt%25C3%25BCrk+pdf+indir PDF link annotation
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/wudirataj-xojirujozed-vasudefe.pdfIn PDF document text
    • http://detonic-de.website/jbl_flip_3_manual_englishtc3g7.pdfIn PDF document text
    • http://adachivia.store/dodimekonopetekihgp7z.pdfIn PDF document text
    • http://dmgameplan.com/autocad_16_crack_freewc30j.pdfIn PDF document text
    • http://meetsalon.xyz/22233989741tgubu.pdfIn PDF document text
    • http://keksik24.ru/toner_fr_hp_laserjet_4050_n185wi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5fd8741e07444.pdfIn PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/3e571f076.pdfIn PDF document text
    • http://bet-info.ru/fusion_integrated_reading_and_writingq6y17.pdfIn PDF document text
    • http://smirnoff-optic.com/840685019168aeh9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456389/normal_5ff8f0cc2968d.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/lezerawe/wedding_day_itinerary_template_free.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_7f9e8cdfee9747188ef8a4e8652c5246.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/badodemebo/74855790658.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_e468866312b945a4ab33455691bc9060.pdf?index=trueIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_5ebe75ab03714792a8a32ff3bf5cdefa.pdf?index=trueIn 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_off00016383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16383 5732 bytes
SHA-256: 41dd4be6f1f72c731d62b98184e4cc06424377e2feed5613a3a9b4db47a5f52d
font_01_sfnt_off00017682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17682 12324 bytes
SHA-256: e182e32590df3d88ee745ef975557d01b48646c9049731c563ea6cf69e372699

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