Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eabe96fa97e5848…

MALICIOUS

PDF

83.6 KB Created: 2021-02-25 15:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 88291fc34c611598458bfb22c7b2bf7b SHA-1: a699ffd0820b5f0e4ba4d9b163007a16808bfe4e SHA-256: 6eabe96fa97e5848d0dbe9e16e59c19d48c9fe2c6183dcb2042fb3d3fdc158a9
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful external sites.

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://bologen.ru/strik?utm_term=best+tasting+heat-tolerant+tomato PDF link annotation
    • http://rugegav.mywebcommunity.org/17466180210.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/how_much_does_periodontal_gum_surgery_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/hgheygf/iassistant_followers_analysis_for_instagram_premium_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729ad26b58.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/nggPrgf/battery_daddy_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwonukunav/bjcib4x/nabetuvelodejet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425908/normal_60013536b83cd.pdfIn PDF document text
    • http://trikotoria.ru/37360745179ljc0k.pdfIn PDF document text
    • http://znohist.site/acrylic_sheet_for_laser_cutterf985h.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/dbrjcoz/29287349206.pdfIn PDF document text
    • http://solapp.xyz/roland_micro_cube_gx_guitar_amplifier_blackyw1i2.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/MMjjjej/to_the_moon_netflix_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/igeuTjf/danuxokimude.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/jarawaxanivu/calculating_slope_from_two_points_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/fifa_score_sheet.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_off00010a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 5180 bytes
SHA-256: 99c59672975f37e24d1da33477751bb9d1f317edc3bc50f645989e9f0685fb07
font_01_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 11476 bytes
SHA-256: d2c07d1083c9b4601fc5ac176c4d29a1da61b8931cefb44ea58f63480177e7f7

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