Malicious PDF — malware analysis report

Static analysis result for SHA-256 9172df232e681b42…

MALICIOUS

PDF

92.0 KB Created: 2021-05-04 03:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c5ccb1b42a1cbb08c74202d5628c8431 SHA-1: 0d05b6dbad6043b4380f9848288e38d29c131c66 SHA-256: 9172df232e681b42d2a33a7f5d89f4d71e2885715a999d028388dcb047939ffe
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure for pirated movie downloads, which is a common tactic for distributing malware. The presence of multiple external URIs, some hosted on disposable domains, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=the+revenant+full+movie+download+dubbed+in+hindi+720p+watch+online PDF link annotation
    • http://migajipanijezep.22web.org/4._2_exercises_algebra_1_answers.pdfIn PDF document text
    • http://sifinujox.sportsontheweb.net/tejozaz.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/39568541345.pdfIn PDF document text
    • http://zugobopepoj.sportsontheweb.net/20754345862.pdfIn PDF document text
    • http://fofajofafe.iblogger.org/xulaxodasuvexi.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/9843d89e-ad36-42ba-a51c-0cac5b596722/tp-link_tl-mr3020_review.pdfIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_6025926c32d8482ab877437a2a257204.pdf?index=trueIn PDF document text
    • http://muvekalufisu.atwebpages.com/nubezupomowolotulegegu.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_95f992d56bac46e8b224b0b32f059896.pdf?index=trueIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/wrong_side_of_heaven_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5bb6bb9-e7a0-4393-9a99-aeb94491a9b7/pujuwuvafuwonenegebafij.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/kavijosavukawupomajarulav.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_718db7d121bf4eaf9fe5862f35e79e51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b20545-dfed-42dd-9c03-ba204f5026bb/vozedurewunup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e704093-2c9c-4ef2-980d-ba2a4556e94a/how_do_i_program_my_xfinity_remote_to_my_rca_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/zowuzimukozigixonubode.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_397109334ff548b4bd98e0e2b7146a5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25834b63-d4c3-4bd3-9933-03541ba8a244/14156569900.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/91293773764.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_f5c21514e4c74ff09324d54ad4e0b253.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_723be616eb0043cfbe841976b7018f27.pdf?index=trueIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_817ccdd5b71741e288dfba3d6e754c67.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_off000129b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B8 5812 bytes
SHA-256: dbf7d1c7f764641cfab755e7ae87f70247ab7cf65f132974302c1a2a482dc363
font_01_sfnt_off00013d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D76 10732 bytes
SHA-256: e8b593651654e58271ed63e38e14b9dfd289d73c6eb7b0733a192eaad7b277de