Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f91972a1ce1563…

MALICIOUS

PDF

78.2 KB Created: 2021-03-03 08:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5e69bac4b88cd656117affbeb83502a8 SHA-1: 47ca6e9598f04404329fe5bbf0aca0deda88f0fe SHA-256: f2f91972a1ce1563f652d7f9d0f81106304150308ba3126a1a6f80847f865f12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains a query about historical periods, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=what+time+period+preceded+the+renaissance PDF link annotation
    • http://50offstore.info/alone_together_escape_room_review4ieec.pdfIn PDF document text
    • http://fastdonwload.space/exercises_stative_verbsaekw1.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/drum_rudiments_poster.pdfIn PDF document text
    • http://tiktokfrance.fun/1626646939yatdu.pdfIn PDF document text
    • http://atomyimperial.ru/wuvewusamiwuxugav83lg6.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/ca_drinking_water_standards.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/el_camino_del_artista_resea.pdfIn PDF document text
    • http://hrushch.space/2016056050785s97.pdfIn PDF document text
    • http://opt15.ru/one_summers_day_piano_tutorialfj7t4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5ff37e0cd3ff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_603b79879acd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_6024247863ae2.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/lexuwigolulevigonepu.pdfIn PDF document text
    • http://andyhong.blog/halo_master_chief_collection_xbox_one_achievement_guide2sgrs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/dot_product_worksheet.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/char_griller_smoker_manual.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_off0000f704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 5296 bytes
SHA-256: 276248109b24c226bebc9e6b7476c428771e529be727ed5f7a67a5807913a3a9
font_01_sfnt_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 10152 bytes
SHA-256: b9b724ecea6d9b203d1c35cce602eb23b31ad908021633e23ef35e510147baef

Open this report in the interactive analyzer, or submit your own file for analysis.