Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29593d1801de697…

MALICIOUS

PDF

72.2 KB Created: 2021-02-24 00:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 08e63751e2c9dabf9947c4c3594a2844 SHA-1: b902d1d228f95f340e58644232188bec91ac8998 SHA-256: c29593d1801de69762931916e0dfecb0ab75793ddb62ef931e5ec83002b7b9fd
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/wix?keyword=perjalanan+ajaib+edward+tulane+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458615/normal_5fe85948d590f.pdfIn PDF document text
    • http://coloradocustomelectric.com/aids_full_form_in_sciencew1ot5.pdfIn PDF document text
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/taluvamubebutiko.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/Zjgjgig/pet_doctor_911_in_mcallen_tx.pdfIn PDF document text
    • http://gimogorox.22web.org/80694844129.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/tifBWjf/kosujatinazonuxilegilefef.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/NIbbgcJ/csr_classics_hack_no_human_verification.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/915797.pdfIn PDF document text
    • http://lejalabaku.22web.org/67533407885.pdfIn PDF document text
    • http://g2am2e.xyz/puwubibenawimua7yzz.pdfIn PDF document text
    • http://show-visitor.xyz/essential_environment_6th_editioni3xxw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464523/normal_602149a0df5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_600b8e387458a.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/ibggXhb/79333600738.pdfIn PDF document text
    • http://mesretly.xyz/panasonic_bread_machine_sd_2501_manualzhomt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc582c6f3f7b.pdfIn PDF document text
    • http://lastmarkt.ru/548346471830u7yn.pdfIn PDF document text
    • https://baluwakenina.weebly.com/uploads/1/3/1/4/131437578/torugukefef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fitimulosegi.epizy.com/tipos_de_bombas_hidraulicas_automotrices.pdfIn PDF document text
    • http://wulekugigewipo.epizy.com/vaguwetuwitotuzagexal.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/ada_diabetes_guidelines_2017_ppt.pdfIn PDF document text
    • http://vixoboguwexalo.rf.gd/81215563579.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/ccat_exam_form_2019.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_off0000de3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 5164 bytes
SHA-256: 513cab1b2ac007619d5fa3d924db67de875f2726c1a0f13d851100eba46944e3
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 10348 bytes
SHA-256: 976fb8af36bf78ba4b0f07f32ca0cb4fd48ab758571503aca4c7d8a6a62b20ea

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