Malicious PDF — malware analysis report

Static analysis result for SHA-256 075412a4a8ae3a23…

MALICIOUS

PDF

80.9 KB Created: 2021-03-15 06:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: b11c8f732acab4e6d2afd50d6819d75d SHA-1: 5ec3e979fe5a401d289ff5c7510a2984bbbaf348 SHA-256: 075412a4a8ae3a23de5abd3b488ccc5c5c979b6c3ccebaf731dc92dded03d6af
66 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and contains numerous embedded URLs, many pointing to disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic strongly suggest an attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://golowaki.ru/123?utm_term=cyber+risk+management+framework+template PDF link annotation
    • https://bomitepoz.weebly.com/uploads/1/3/4/8/134895739/dodexose.pdfIn PDF document text
    • https://gedinabudi.weebly.com/uploads/1/3/0/8/130814056/solafize.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/fusionner_en_un_seul_document.pdfIn PDF document text
    • http://fdvsefwfrw.space/mewinivusubiwesonosevevli4.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/kejudipado.pdfIn PDF document text
    • http://xivitej.66ghz.com/xujuvebiji.pdfIn PDF document text
    • http://copyrighthelpptteam.com/windows_movie_maker_windows_7_tutorial_.pdfyg26h.pdfIn PDF document text
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/gosibetu-pumiz-zepirefe.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/what_is_the_poorest_place_in_new_york.pdfIn PDF document text
    • http://padapup.iblogger.org/rikki_tikki_tavi_characters-pictures.pdfIn PDF document text
    • https://ropejanetim.weebly.com/uploads/1/3/4/6/134600341/6418934.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/94393670737.pdfIn PDF document text
    • http://sosed.market/outbreak_words_meaning_in_urdutt96j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_604b4d2ed7f83.pdfIn PDF document text
    • https://winapusumebut.weebly.com/uploads/1/3/4/6/134695108/63d85db0e440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_6019fff81ca9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopiguxa.atwebpages.com/44_codigos_arcturianos.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/news_report_today_video.pdfIn PDF document text
    • http://vegawududabuz.rf.gd/98719399497.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/the_lottery_literary_analysis_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/android_carplay_app.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/ccna_materials_free.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_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 5524 bytes
SHA-256: fc994139481b77da0c867b7560071bb8eb5436d35488fa5215be00c4707ce9ea
font_01_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 11044 bytes
SHA-256: 8779d5f6c6933c3ab1066781181927acbfab694e0ba498d96bea25aa55506b79

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