Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ead3f1b71a76a5f…

MALICIOUS

PDF

87.4 KB Created: 2021-02-25 23:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eb6ac89c2373941ebe45f3f2b8eabbd2 SHA-1: 588d7cbf1549981a0c1a8e1eba119caf6c507323 SHA-256: 3ead3f1b71a76a5fbcdc54ec52902aadd904f691c2b4dd80fc27bb7ea9a5a380
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs, suggesting it functions as a link farm to distribute malicious content. The presence of embedded URLs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=first+three+parts+of+the+constitution PDF link annotation
    • http://pazujiz.mygamesonline.org/tony_little_gazelle_freestyle_elite_cross_trainer.pdfIn PDF document text
    • http://togurebuk.66ghz.com/cat_in_the_hat_coloring_sheet_printables.pdfIn PDF document text
    • http://desokore.medianewsonline.com/will_there_be_a_series_2_of_alex_rider.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/70957407662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_60115270348ae.pdfIn PDF document text
    • http://vuwadezizubem.22web.org/46242644141.pdfIn PDF document text
    • http://akb54.ru/cisco_packet_tracer_for_mac_freeqfljm.pdfIn PDF document text
    • http://nazawate.iblogger.org/death_note_live_action_japanese_2006.pdfIn PDF document text
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/wejuziwefixakiv.pdfIn PDF document text
    • http://domainlimax.xyz/86785876823dncc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5fcf661b7723d.pdfIn PDF document text
    • https://sutomoloxoxe.weebly.com/uploads/1/3/5/9/135986515/kasak-xisekajozuxegig-pinizitebevete-suniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5fd5f4118c6e5.pdfIn PDF document text
    • http://italylife.pro/togasasantm71g.pdfIn PDF document text
    • http://gomotejux.iblogger.org/caetano_veloso_joia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaritopewebo.rf.gd/kajab.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/how_long_for_walmart_photo_prints.pdfIn PDF document text
    • http://mutodavop.rf.gd/domogizejunibikuzib.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_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 5024 bytes
SHA-256: 36c0a66bda8396bec383c10fce1d67cc37acaebe79b894a2335759dedaa356f4
font_01_sfnt_off00012c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C21 10420 bytes
SHA-256: b66b1fd5bf6aaaac8488596058cec5680e43d0392c9e5442737265b4d4acd409

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