Malicious PDF — malware analysis report

Static analysis result for SHA-256 5719c02825161add…

MALICIOUS

PDF

70.6 KB Created: 2021-03-02 12:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b6d90c11e58bdc458027be743d35e8c6 SHA-1: 4859debc3e57ef3ccc19bcdd6f4100c8b9e382ab SHA-256: 5719c02825161add04fcd89e94516e4629fd34407fec4e326b7ac000ca986626
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing and link farming. 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 embedded URIs suggest an attempt to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

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://zajinet.ru/award?keyword=omc+cobra+outdrive+repair PDF link annotation
    • https://cdn.sqhk.co/duponetix/OZhahys/38449331467.pdfIn PDF document text
    • http://medyahanem.com/lixezesaparalvu7bk.pdfIn PDF document text
    • https://cdn.sqhk.co/nodomepe/3jjTZ28/playstation_5_release_date_uk_pre_order.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/95566519263kxcuj.pdfIn PDF document text
    • http://service-hire.com/zekerosubisezavlc52.pdfIn PDF document text
    • http://pedrons.space/38738619694qeyly.pdfIn PDF document text
    • http://findattime.com/17572087713fxyqd.pdfIn PDF document text
    • http://keepmaxi.space/advanced_ip_scanner_for_androidalcu7.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/pudukiziju.pdfIn PDF document text
    • http://motirepefasake.iblogger.org/impulse_response_or_library.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/vjchihj/top_marketing_companies_in_dallas_texas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noperuzibob.rf.gd/sevefedav.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/wikirenekujujexiji.pdfIn PDF document text
    • http://fopupasefe.rf.gd/inception_time_sheet_music_trumpet.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/miluzevugakarowexo.pdfIn PDF document text
    • http://lofimezil.rf.gd/25875582700.pdfIn PDF document text
    • http://molujafit.atwebpages.com/doctor_sleep_movie_review.pdfIn PDF document text
    • http://jemileti.atwebpages.com/xobumubaguxifivesobat.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_off0000d580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD580 5236 bytes
SHA-256: 8ee4a7c0e7d35b8a1cbc96749764cec718637439f7e49cdfbfc0b928cac3c31d
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 11192 bytes
SHA-256: 683fed9b744ab72db1a7e141e89d0e08da0c7ff79b36db06843a967ab7fff11c

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