Malicious PDF — malware analysis report

Static analysis result for SHA-256 7130fcc50c66702e…

MALICIOUS

PDF

110.7 KB Created: 2021-03-16 05:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0c6bb727e119b44e0b28b1001db665e0 SHA-1: b8ce2cad238abc12fc46a439c8cc36b7760384a5 SHA-256: 7130fcc50c66702e7113fb56ac80d02c1e3d9f04239bf0644cc4177a2964a863
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a significant number pointing to disposable hosting and employing UTM parameters, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://lozipotod.ru/123?utm_term=approaches+to+teaching+and+learning+pdf PDF link annotation
    • https://nigoriwidoke.weebly.com/uploads/1/3/5/2/135296580/rofeg-luzutegip-nusawesuru.pdfIn PDF document text
    • https://susudomi.weebly.com/uploads/1/3/5/3/135319884/jufuw_wasotabafodumi.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/31574928893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_604fe07ae9e3a.pdfIn PDF document text
    • https://jufoxaju.weebly.com/uploads/1/3/4/4/134489692/6920643.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/garudorejaf.pdfIn PDF document text
    • http://sakuravaju.iblogger.org/wusosejixofarekil.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/kooltherm_pipe_insulation_data_sheet.pdfIn PDF document text
    • http://lutafem.getenjoyment.net/the_caucasian_chalk_circle_free.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/muvanat.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/xexadesux.pdfIn PDF document text
    • http://pumaguli.scienceontheweb.net/medical_law_ethics_and_bioethics_7th_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5fcd5c7218699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woriloxalodar.rf.gd/seraritamukavetowalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5216cd-10ac-426c-94b8-e05bc8fa4757/19619708843.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/sepukisafigigulidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a98ccf9-f783-49b9-9e9e-28ed4b8e4376/printable_polar_coordinate_graph_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e34835d-b5ce-41e2-8d0f-4f389aa97f49/nezifebujizu.pdfIn PDF document text
    • http://diwiludoki.rf.gd/free_gre_test_prep_books.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_off00017596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17596 5408 bytes
SHA-256: fd579d02d77c312d9ff3b638521dbaba3b5ec988df3296fc3f999a910e86b82f
font_01_sfnt_off000187f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187F3 10964 bytes
SHA-256: 3a0e51b3995d333ac129c8c3243326b5107c95894eb4a88bb4505e291f68a591

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