Malicious PDF — malware analysis report

Static analysis result for SHA-256 25babfc1c22f5aef…

MALICIOUS

PDF

70.7 KB Created: 2021-01-31 11:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 80e27859d31c84c6112f20e15afacafa SHA-1: 6261f4352d78e923b17d2bd14b1d1d7f5c2dc760 SHA-256: 25babfc1c22f5aef38e25e66be37e1dadc64f177f86c78352165ce06fe008b67
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wb?keyword=world%20war%201%20simulator%20flight PDF link annotation
    • http://form-lnstagramcopyrightservices.com/jizesidodinagavodarsw5hl.pdfIn PDF document text
    • http://am-sound.ru/riwikevosgvqob.pdfIn PDF document text
    • http://katermore.ru/lt1000_craftsman_lawn_tractor_manualbdkg1.pdfIn PDF document text
    • http://daimontimur.org/lucy_the_doctor_is_in6938x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_5fce7c2c2d86d.pdfIn PDF document text
    • http://webdefilmizle.com/59075422599vx1ke.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/logiduwipikadazi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5feb50045d7e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_6014c546a4357.pdfIn PDF document text
    • http://fudomux.22web.org/tetami.pdfIn PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/4522154.pdfIn PDF document text
    • https://wojewifonutej.weebly.com/uploads/1/3/4/8/134883442/pelalelogidesuf.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/wewikaz-modozupobo-xosuk-nowasunusagopab.pdfIn PDF document text
    • http://cloudplay.xyz/93467683234wvkqi.pdfIn PDF document text
    • https://sazotavivi.weebly.com/uploads/1/3/1/1/131164406/2306126.pdfIn PDF document text
    • http://pusaburuku.22web.org/cerium_oxide_properties.pdfIn PDF document text
    • http://centerbluebadge.com/toilet_cistern_runs_constantlyczya0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_5ff3a4210f0c6.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/kenworth_owners_manual2zznt.pdfIn PDF document text
    • http://nesobaka9.xyz/22580989642pw3gg.pdfIn PDF document text
    • http://zarabatyivat.ru/46860111078xf20p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzuzis.rf.gd/acta_constitutiva_de_sociedad_civil_formato.pdfIn PDF document text
    • http://kujidoxavok.rf.gd/car_mileage_tracker_form.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_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 5476 bytes
SHA-256: 6eb6a617daf880260d098ad6c128ee2a75a8e4213c312e195e4a2802c4631196
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 10160 bytes
SHA-256: 8bdedd64083f796beeac45165f4ca10fbfcea5e7c8f1a260e672f219d0f712c8

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