Malicious PDF — malware analysis report

Static analysis result for SHA-256 62085faa13a319e7…

MALICIOUS

PDF

87.5 KB Created: 2021-03-10 20:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ce6c169050667ebf98b8b62ec4248c8e SHA-1: 99a37858bfbc70f9effa6d5504e0922b2ea7cbc6 SHA-256: 62085faa13a319e7970caccdd0e28fa5b9d7a706eb829d5295621a88e3f21e63
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment, likely leading to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=rocas+y+minerales+resumen PDF link annotation
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/sewadoredilu-limugebami-saramumofut-wutojepuzujen.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/iNie4mv/contigo_glass_water_bottle_amazon.pdfIn PDF document text
    • http://dikerulaba.22web.org/croup_guidelines_nice_cks.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/guxojodofanujum.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/3ijrjaw/19407703248.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/59926531928.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/tupuru.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/3828129.pdfIn PDF document text
    • https://cdn.sqhk.co/tubefajuvolu/hjfgfxV/william_hill_golden_goal_advert.pdfIn PDF document text
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/julumuvapiw.pdfIn PDF document text
    • https://vinusipiwa.weebly.com/uploads/1/3/1/3/131381721/75dae8ae722edc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fusozevukatamir.atwebpages.com/the_witcher_season_of_storms_summary.pdfIn PDF document text
    • http://rexerikilo.epizy.com/film_alucard_vs_lancelot.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/reading_answer_sheet_ielts_sample.pdfIn PDF document text
    • http://guseboses.atwebpages.com/mc9090_scanner_disabled.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/6588359888.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/navy_regulations_on_neck_tattoos.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/25938974043.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/beaverdam_park_gloucester_va_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/vakenupebifesodi.pdfIn PDF document text
    • http://najepesirezamuz.rf.gd/thank_you_letter_for_answering_my_questions.pdfIn PDF document text
    • http://zizinamejukurep.rf.gd/petoma.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_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 5052 bytes
SHA-256: 6ffa4955a980b9c50c59dc935a9899381c65583d18721dc683640ca658b72e22
font_01_sfnt_off00012996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12996 11692 bytes
SHA-256: 4c48a7b8868b6d4591b38dafa565b77205a97558fd27efa075c8189c440b1924

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