Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6efae3369eb9af…

MALICIOUS

PDF

74.0 KB Created: 2021-06-11 05:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 98beb5672bcbb20cb1065bb19a523519 SHA-1: 0b2a8b1209b712b588207fcc00410a36990518ca SHA-256: fa6efae3369eb9af6c26d3c38ddd7c502212b45c0cb97f60bf62267412d2f97b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, suggests a lure related to file conversion, aiming to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://allytemp.ru/pbw?utm_term=convert+pz+to+mp4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366381/normal_6020cf1369dce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_601ab02feb3a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_6021a386049d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5fd1e0afca20d.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/b0fe0e19-a312-4578-b1ca-f77b2474b962/pegexexudenet.pdfIn PDF document text
    • http://gutopevif.pbworks.com/w/file/fetch/145097781/download_ultrasurf_vpn_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7707ab3b-a66e-4089-acd4-95da94d8bb1b/garrett_ace_350_pro_metal_detector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f071f5-755d-4040-ab3d-1fef0dab1160/vocal_remover_pro_full_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8425b06c-d6ab-4ffd-827b-b414b369ce06/fisubaxozejotixovubudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386e1884-dfbe-4948-a597-43cbd4ede20f/how_to_clean_a_keurig_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4126c7c-a339-4911-8404-910ac7e170ff/rogaponijixizomutulidubex.pdfIn PDF document text
    • http://gajufabeke.pbworks.com/w/file/fetch/144423447/66867647862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b71da1-b26d-4bb7-aa8f-2b07fddb5532/soriwifaxanija.pdfIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/145097730/widobejasolunimo.pdfIn PDF document text
    • http://lipovosufuk.pbworks.com/f/free_ai_dungeon_premium_account.pdfIn PDF document text
    • http://vimaxojejo.pbworks.com/f/jerome_bruner_biography.pdfIn PDF document text
    • http://karulimomaw.pbworks.com/w/file/fetch/144915339/26653996316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad83816-ca0b-4b8b-a061-2ee9db8bfc68/what_is_question_method_of_teaching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6a7165-d2ff-4061-ab9d-e8202c8ce6a9/61020266838.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/w/file/fetch/144500760/what_is_the_number_269_mean.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_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 4648 bytes
SHA-256: cf336a23d27de9f1c3a0f7975f8aa8f3bda9a51d834811c650bd0bd598d559ab
font_01_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 10288 bytes
SHA-256: f4bc22d758ef7be1ae1e4b7f7de956f47028a5ea411bf9f265680fed4526febd

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