Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fd19eb4a2aa89e…

MALICIOUS

PDF

66.2 KB Created: 2021-02-22 03:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0c013337c2149c9d0212082e1b20e350 SHA-1: ee5d8686db26ff8dc18a4746df3dec5892c9405c SHA-256: 93fd19eb4a2aa89e4c69ceded7618f0d6e1143cb3edcf1898caedf8903f34b56
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external links are indicative of malicious activity.

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 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://bologen.ru/123?utm_term=social+psychology+gilovich+5th+edition+ebook PDF link annotation
    • https://penosemoboz.weebly.com/uploads/1/3/2/3/132302809/2914323.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5ff2fbd4697b9.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/8lAhbic/xokulifigi.pdfIn PDF document text
    • https://cdn.sqhk.co/nolugavetiri/0Z2gcij/suzuki_t500_cafe_racer_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_6021966aa34f5.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/hd8Y6ih/f1_official_race_calendar_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/gjLtibN/39726643639.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/dN3sWja/painting_with_a_twist_at_home_supplies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365553/normal_60022671b15a6.pdfIn PDF document text
    • https://buboledimuxum.weebly.com/uploads/1/3/4/0/134017333/fetufetosa.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/tjTgfjc/80942726327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fe631f2071c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_60315781902b8.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/WjhdPrf/pezimomiliwixiwimulab.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/cvAiiLx/samurai_jack_path_of_destiny_flash_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5fc6502146095.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/xurixado/29692435004.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/answer_with_gentleness_and_respect.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/marketing_agency_proposal_template.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_off0000c48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48C 5832 bytes
SHA-256: a17117826f7570b1325af4360f7b8ec4e2da208b6566c0f8629b811eb5a31966
font_01_sfnt_off0000d86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86D 10168 bytes
SHA-256: 8a4c7f47a0a2864447edde6c351f05e4d9b0f86ec84b2d58e74ebac6e014bb60

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