Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e501870478cb1f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 15:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 93538c3968a53b9fa851d2007877167f SHA-1: 2322ea8f49cf8f809fc2a55a575825cf64d34b26 SHA-256: d1e501870478cb1f542f6242246dbde5107fe318d2be27b68b467bf15097b6fd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://lozipotod.ru/award?keyword=complete+vocal+training+pdf PDF link annotation
    • https://jotowaviroretog.weebly.com/uploads/1/3/4/6/134604658/budogu.pdfIn PDF document text
    • https://polemezal.weebly.com/uploads/1/3/1/4/131452876/6435140.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdfIn PDF document text
    • http://gigezojiradof.scienceontheweb.net/95072517894.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dT5gjuD/saxevisimewolukubaro.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/xD2tbgd/.pdfIn PDF document text
    • https://cdn.sqhk.co/mozozezowos/jhPn6bg/sutobanojisumobekilu.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/tugufera.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/57975174608.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/jugawirevuke.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/3755645.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/djdZ4gh/99479429139.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/73be817.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/husky_120v_inflator_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/surah_al_mulk_urdu_translation_only.pdfIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_c4c16168b9c3465bbc430e0759fea80b.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_65b2176a436540dca03f34deb2185ac9.pdf?index=trueIn PDF document text
    • http://bitines.myartsonline.com/how_to_find_lim_fx_as_x_approaches_infinity.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_37bef7a8db364ab7a4dea08aeb10df9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/jonemirirafinujozub.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/boomerang_for_gmail_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/301983959.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/cunto_tiempo_se_puede_tener_el_carnet_de_conducir_caducado.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_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 5260 bytes
SHA-256: 400f2151bc18b8c4429b0aadf34beff79420478c5fe9e12f698c7e661b4c8eb2
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 11432 bytes
SHA-256: 81d555003053cc58a8b8b04f1a70ed1beef298576975f3e56775b7de1369f284