Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfb6445472ecc7f…

MALICIOUS

PDF

148.5 KB Created: 2021-03-18 23:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6c4f9cf2d6c9a20f642c9c55d2d5ea1f SHA-1: c61664db5ed4b5087d16d5dc2e81ab57d24c64fb SHA-256: 0bfb6445472ecc7f0d83e9072c0979a339ac5ed5d81adfe5ddd22799e3116af2
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs, with a primary focus on https://lozipotod.ru/award?keyword=what+is+anorexia+nervosa+pdf, suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates the document is part of a link farm on disposable hosting, reinforcing the malicious nature of the embedded links.

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://lozipotod.ru/award?keyword=what+is+anorexia+nervosa+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483082/normal_60033f10d066b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_60037f7d66001.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/gjajhjs/real_antistress_stress_relief_relaxing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/gfy3had/dragon_bubble_shooter_aarp.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/gigjNgg/field_hockey_packet_10_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/heBVVOK/34392576787.pdfIn PDF document text
    • http://jelepasit.22web.org/faux_calligraphy_worksheets_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5ff6148fdf65f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_6029d9b962a9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476301/normal_5ff5dedbde283.pdfIn PDF document text
    • http://xogiraj.iblogger.org/wuvegon.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/71f548b8-8343-457a-9eed-f037825f3361/xumapevo.pdfIn PDF document text
    • http://gupevaworekupa.rf.gd/compressed_fibre_cement_sheet_cut_to_size.pdfIn PDF document text
    • http://dafunidubavilo.rf.gd/pigazafabujip.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_65fc316b6cea4712a0c9efa2fbbb7b1d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51259d4d-7b9e-45f5-b42e-03858feadd79/what_is_ticker_symbol_for_sp_500.pdfIn PDF document text
    • http://wemopax.rf.gd/who_built_angkor_wat_and_why.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_16cee580cc3747ad9b53d0fe970e7d15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/891c9bfa-6d01-4aeb-8480-742da148de5a/how_to_pair_ihome_bluetooth_speaker_ibt33.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_a152d851f19240fdb3557c27154cb53a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5401e83e-ed9a-4056-9142-38189e59ccd7/22174614706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f6b3022-fddb-47f4-a993-aafb9060219d/innova_3030f_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_off000205e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205E8 5236 bytes
SHA-256: ebe68fb28ff987a62f3f0b5c460e54895907f28de18396297683d6bc7484786c
font_01_sfnt_off000217c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x217C5 14336 bytes
SHA-256: c4e71aa4e8055496ed250670ba2e128ce70223d6380f42eefad789d6a87e4faa

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