Malicious PDF — malware analysis report

Static analysis result for SHA-256 29450f2c4b16eb77…

MALICIOUS

PDF

78.4 KB Created: 2021-03-07 15:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fd0c348ad5192437bacc8134c18aaff3 SHA-1: be2f8dcccc2fce71722edd43d2bb6fdb038ae7e0 SHA-256: 29450f2c4b16eb774783f698c3113aa2b90a370f741ae53cfff3ac7d044561b5
126 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to car maintenance, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://ponafet.ru/strik?utm_term=toyota+corolla+2016+oil+filter+change PDF link annotation
    • http://bubobimurasawe.iblogger.org/81095943734.pdfIn PDF document text
    • http://kepukarob.sportsontheweb.net/lafulugulikaweruroluxibaz.pdfIn PDF document text
    • http://topesiz.22web.org/vinokamileperulamadizoto.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/pidegude.pdfIn PDF document text
    • http://falifipes.iblogger.org/60402163399.pdfIn PDF document text
    • http://fixalab.22web.org/tnpsc_app_exam_answer_key.pdfIn PDF document text
    • http://wobixoka.66ghz.com/sixth_sense_technology_abstract_free.pdfIn PDF document text
    • http://witogitozukifon.iblogger.org/milton_friedman_capitalismo_e_liberdade.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/86273834303.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/final_fantasy_7_complete_walkthrough.pdfIn PDF document text
    • http://josebixotarez.22web.org/muxatagatanaresase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e0029c-e873-49e9-a07c-5807fe9f3155/17859956456.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_1c41c8445768423a9db67dba0b0e0180.pdf?index=trueIn PDF document text
    • http://pazutoxun.epizy.com/toro_s200_carburetor_rebuild.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e785d86a-967d-4309-a4e7-401ff553e149/30578841229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827317c3-24cb-4cd7-8eb5-cfdca5f87cb4/distributed_computing_definition_computer_science.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/software_architecture_books_free.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/29188134686.pdfIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_8c5584f4348b43288a4029c37b5aef9d.pdf?index=trueIn PDF document text
    • http://pusiruj.epizy.com/manual_singer_heavy_duty_4432_espaol.pdfIn PDF document text
    • http://fumebuz.rf.gd/53370600818.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/16962515768.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_212a5db2dbcb4804bf5e4a6d1cccb24e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab7b3a5-2d89-4f31-8059-017ffcc6ae23/how_much_does_a_client_service_associate_at_morgan_stanley_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36a45f7-e2a1-4efc-907a-cf571d40df51/bosesebekefakinawari.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/gajelov.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_6a4d771fd3bf4808b1620aa17a4e8c5e.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_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 5496 bytes
SHA-256: 8e5d043f03db6100cb5ba446bf14ddcdbacc75474d9f77cc0b89ed284c21b3f5
font_01_sfnt_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 10224 bytes
SHA-256: 399fd36a7d246ca0083f85b29c686cef3e2bc94eb3ff15e8cb450c47d7dc8282