Malicious PDF — malware analysis report

Static analysis result for SHA-256 356105f2717e9504…

MALICIOUS

PDF

75.8 KB Created: 2021-02-24 21:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d1771db3eeb1bfd539a4a94a360b5a00 SHA-1: fb993b1400f54d5a6849589cf367a822d3e6cd5f SHA-256: 356105f2717e95048e05dbdadf79ed43871238695ce04d93716a7a9e12c4bd71
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. The embedded URLs and the document body suggest a lure related to WordPress admin panels, directing users to potentially malicious domains. The presence of numerous external URIs and link farm characteristics further supports a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=wordpress+admin+panel+redirect PDF link annotation
    • https://namovanuzo.weebly.com/uploads/1/3/1/6/131606642/ribawikom-lopupaliwo-xinozejixo-vugerunuwewak.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_administer_the_ssi-4.pdfIn PDF document text
    • https://kebezade.weebly.com/uploads/1/3/4/4/134479439/ritikinudunawalej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5ff783391dae3.pdfIn PDF document text
    • http://latuha.com/modalidades_de_trabajo_en_primaria_aprendizajes_clavel2e3q.pdfIn PDF document text
    • https://lafetewefovizav.weebly.com/uploads/1/3/4/3/134385578/462d3c2638bb.pdfIn PDF document text
    • http://interplast.ru/xomoszh5d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_600d5458a1ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_60360f90e8f91.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/odyssey_fagles_audiobook.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/11856501038.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/honda_eu2000i_carburetor_bowl_gasket.pdfIn PDF document text
    • http://complerbnp.com/electrical_compliance_certificate_templateyfs80.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/what_does_color_black_represent_in_bible.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/19983814081.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/wumodukubaru/cerwin-_vega_sub-_15_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/tuvunevoxiza.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/37847240095.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/cardboard_animal_cutouts_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/bonkheads_full_version.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 5232 bytes
SHA-256: be1328eb1d5a8435e02d2ed6d5e80fe9a179f2b68f899a7f49fdbd5c0cb9b8da
font_01_sfnt_off0000f0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 11792 bytes
SHA-256: 02351cde1856383bafcab74772da0fdb763681171d8e42de5c7c7985d9ff85d5

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