Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29d0a03181c8425…

MALICIOUS

PDF

74.9 KB Created: 2021-03-04 00:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1634b0732ce3c5046e31466aa9741cad SHA-1: 1a511fdffd20253f2a26f164a5d673765a103d16 SHA-256: d29d0a03181c8425a7a423eab45a450f412dfd2056e0acfdf479c75fbcd77da6
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain keywords related to product searches, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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/123?utm_term=dyson+ball+animal+2+bagless+upright+vacuum+cleaner+filter PDF link annotation
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/50759.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/jiraxifavita.pdfIn PDF document text
    • https://cdn.sqhk.co/moradivovep/dp01Egf/sugar_free_sponge_cake_recipe_uk.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/9bb67.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/9237889.pdfIn PDF document text
    • https://sopebanodi.weebly.com/uploads/1/3/4/0/134017095/3910080.pdfIn PDF document text
    • http://relax35.ru/sap_joint_venture_accounting_booktdv27.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/ZGjE2ji/electric_guitar_amp_for_sale_near_me.pdfIn PDF document text
    • http://osummer.space/hashtags_2021_hashtag_generator_for_social_mediakid74.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/bhdZnb1/cut_up_lyrics_ned_s_atomic_dustbin.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/Rhechjg/fishing_legend_hook_remover.pdfIn PDF document text
    • https://junapeborizako.weebly.com/uploads/1/3/4/4/134443413/4664930.pdfIn PDF document text
    • http://antonioita.fun/9120061522080ul0.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/fovezewi/tl_wr841n_router.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/60630551687.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_off0000e1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 5864 bytes
SHA-256: 2ae64e699050a8a974d67b68fb486ec6fcc079b34294dba4fac8d7c72a4b51f7
font_01_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 11280 bytes
SHA-256: 0314f44665947dabe0c9f9e2fd68d7a43f6142e0bebdce1d47dee5caf39eb01d

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