Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca019184a112c29…

MALICIOUS

PDF

69.5 KB Created: 2021-02-20 17:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 974603053e579f1ba8474e250c9b5c47 SHA-1: 78e851b1cca1229fff115a51636d44b1159e1822 SHA-256: 5ca019184a112c298ce760d36d5ef0863b6a3dd2a6c4ef8ed7c1d6d35ee0c3a4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it functions as a link farm or a phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=how+to+make+a+d%2526d+campaign+for+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417213/normal_6017a82570b96.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/zygmunt_bauman_libros_amor_liquido.pdfIn PDF document text
    • http://wgathering.org/27052187984oypup.pdfIn PDF document text
    • https://cdn.sqhk.co/revowemerem/dTTjd9i/the_silent_age_walkthrough_chapter_8.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/hjajhJ4/music_and_arts_rental_promo_code.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/lezulo.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/idjrnBb/7_ancient_wonders_of_the_world_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/dPjf6if/topps_dinosaurs_attack_trading_cards.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/dazovosugev/70181250316.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/50670844631.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/would_fill_a_void_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/hasi_ke_chutkule_video_mein.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_off0000d5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CF 4780 bytes
SHA-256: 4e74a5884b1c51bf07e1db7b7f8b2b453a15348ecb2de8f8339c50b0288c6235
font_01_sfnt_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 10276 bytes
SHA-256: 60f72d061a5e96aa4425a34b214ff865240c46a887c429b5652d55a418b62eb9

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