Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02415b8ccbde321…

MALICIOUS

PDF

70.5 KB Created: 2021-02-26 15:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d4c689206a7cf41a03707d5517e59a30 SHA-1: 30af0d9709185ff2a7291d4449f4f654e7874bef SHA-256: c02415b8ccbde321a54eecaf323e4973a0188b8f4b6cc0a262e5b8c12b94dc82
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://dugedepap.ru/strik?utm_term=the+places+that+scare+you+pdf+free+download PDF link annotation
    • https://gulurevipad.weebly.com/uploads/1/3/5/3/135349864/5475730.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/cjDgiwv/73863219283.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/59586281081.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/the_other_side_of_midnight_1977_filmaffinity.pdfIn PDF document text
    • http://setixin.iblogger.org/mindtap_microeconomics_answers.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/lezunegewukazanuvas.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/jXgghdU/advance_auto_parts_in_jackson_michigan.pdfIn PDF document text
    • http://simupujumojata.22web.org/cheapest_way_get_carfax_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/c7WyMif/96862091359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivimufe.atwebpages.com/gapimorinokabudutofiziv.pdfIn PDF document text
    • http://sisawujeza.rf.gd/jigsaw_puzzle_piece_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/types_of_dramatic_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/vizabakupevolubavaxex.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/mezowebisemu.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_off0000d438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD438 5384 bytes
SHA-256: f433d4e0f561d11d59772b0cf3e9624c9d801fe5bd79ba45e68344c19987de24
font_01_sfnt_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 11340 bytes
SHA-256: 653713fb0cb6edff17abfdecff14f2f040dd4f2cf7e2cc0e66a914c68c4907ac

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