Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb766133142567a…

MALICIOUS

PDF

98.6 KB Created: 2021-03-10 18:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 114f0c4053e81e51f06b9b63a4656a96 SHA-1: 73383cf8e8a4f951c9344980b16ec31f71af71f7 SHA-256: 3cb766133142567a74fa9d970cd99376c2a028b641dc308f791bd7c95d0c38a0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/wix?keyword=hal+martin+baylor PDF link annotation
    • http://pasipodo.mypressonline.com/42365686412.pdfIn PDF document text
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/tupopowusalopututo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_60254753d39dd.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/the_tragedy_of_macbeth_act_2_answer_key.pdfIn PDF document text
    • https://lewovabarififu.weebly.com/uploads/1/3/1/4/131453312/bc8b0dc1f7.pdfIn PDF document text
    • https://xoxefalumigak.weebly.com/uploads/1/3/4/5/134527234/jelibulivolopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_60194e734f10c.pdfIn PDF document text
    • http://xeboxemovev.66ghz.com/news_greenland_ice_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_60432065cce06.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/kadabuzoni.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/wotusamubipos.pdfIn PDF document text
    • https://vinixojaz.weebly.com/uploads/1/3/5/3/135312356/gopuk-jebamaxazow-jumepu-nesuxusijoja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nulukuduvi.rf.gd/20509521712.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_3931ede8f1064aea831ed509097e0b69.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_7890b55038174ea3ac090f172c123495.pdf?index=trueIn PDF document text
    • http://lamoren.rf.gd/1969_ford_mustang_mach_1_for_sale_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/pathala_bhairavi_telugu_movie_songs_free.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/zesixonunir.pdfIn PDF document text
    • http://popaxaxi.epizy.com/16064372734.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/agatha_christie_books_collection_uk.pdfIn PDF document text
    • http://manutilo.epizy.com/64688455024.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/gojapadarelinevof.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_f4c84a064bbe44128dd9c6768f00e683.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_bb3351f33cc84aa9b4959432b786caa8.pdf?index=trueIn 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_off0001495b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495B 4856 bytes
SHA-256: c2be0c58db30436cb79f746e3b50274e6f97fb2a3e587e01b5ebe8ecb42ce909
font_01_sfnt_off000159cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159CD 10424 bytes
SHA-256: 3cb04db366732996c1f89d9f5839495633083c471da0b599ce868f3fe2d794ad