Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60ddaadb6a56083…

MALICIOUS

PDF

78.4 KB Created: 2021-04-24 08:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7012f71034b6b3471b6d6f5361054241 SHA-1: 523e841c81e4819f9f9b39cd3ae57b549840bcf8 SHA-256: e60ddaadb6a5608356385ab4f70289dfb1086a22c5962afcd0a46c2dccce432e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://leonvi.ru/strik?utm_term=much+ado+about+nothing+quiz+act+1 PDF link annotation
    • http://sutovuresas.mygamesonline.org/rutupunapurafijugok.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/waterigiverakovopu.pdfIn PDF document text
    • http://mokugujumekov.sportsontheweb.net/47478555206.pdfIn PDF document text
    • https://zinibikilejob.weebly.com/uploads/1/3/4/8/134886520/zejul-woxozozuxele.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/english_vocabulary_for_test.pdfIn PDF document text
    • http://repovor.22web.org/enterprise_risk_management_adalah.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/kingdom_principles_book.pdfIn PDF document text
    • http://jirapunobos.22web.org/boca_do_inferno_gregorio_de_matos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_6008f83a01d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483097/normal_603349ae9d5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485823/normal_60199d669b3bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_6004cffcd083f.pdfIn PDF document text
    • https://bimelubisazabe.weebly.com/uploads/1/3/4/4/134492892/duxomovepaxe-pomonivuga-sekimeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_6064d20d4d007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikutixutawax.epizy.com/journal_of_protein_metabolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73159c1-9bb8-42b3-a618-d43fbe8ce234/kenwood_kdc_w3041_protect_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/chris_paul_thunder_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8955e72-07b1-450d-a0b9-d84b5c5d2376/ap_human_geography_unit_2_vocab_migration.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/mifawuxoxelibaserub.pdfIn PDF document text
    • http://gotazuvibidok.epizy.com/7934278997.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/vernon_howard_a_new_life.pdfIn PDF document text
    • http://wekumut.epizy.com/14145568635.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_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 5268 bytes
SHA-256: 42005cb07933375bc0067f3dc9999e45541b9c0ba2d3e713241fc44bd2333f50
font_01_sfnt_off0001066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 11000 bytes
SHA-256: f9cf0e3caf04489b11b7877b3b35d0530e92d806033e1074d9bf526cc1736aa4

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