Malicious PDF — malware analysis report

Static analysis result for SHA-256 9508931958283785…

MALICIOUS

PDF

86.2 KB Created: 2021-03-20 16:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b4a4abd2a156ca238f6c4c793430cdda SHA-1: af718eb1bea89699c5d5cf4e7b84380d4526496d SHA-256: 95089319582837852ab7427209b05818078b8b712aabc0c3216de67bd9e241d5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/award?keyword=anticorpo+monoclonal+pdf PDF link annotation
    • http://rafupofamurawaf.mygamesonline.org/fibitifavaxi.pdfIn PDF document text
    • http://mestorating.ru/angry_gran_radioactive_run_mod_apkqp9ct.pdfIn PDF document text
    • http://dizanuvusawowi.22web.org/ctet_syllabus_2020_in_english.pdfIn PDF document text
    • http://maturibcgj.space/rental_lease_early_termination_clause_examplewesca.pdfIn PDF document text
    • http://legko.travel/52285208692zthcw.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/71680355972.pdfIn PDF document text
    • http://topvideo.design/what_is_future_it_jobsqqot0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gupojakami/enthalpy_of_solution_chemguide.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/jarazodav.pdfIn PDF document text
    • http://siwebojik.epizy.com/games4gains_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/plantronics_voyager_legend_bluetooth_peripheral_device_driver.pdfIn PDF document text
    • http://pevosatukiluv.rf.gd/56144600632.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_93e964cc765e41b9888879e147c0431f.pdf?index=trueIn PDF document text
    • http://sozidimimu.rf.gd/64545596928.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_5a548e08d4ea4cdca98dc44d43782784.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_51d2a2137d3a4bb093f67b0ff6851f73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobesogum/72939842233.pdfIn PDF document text
    • http://vabulepune.epizy.com/bamu_b_pharmacy_syllabus.pdfIn PDF document text
    • http://midelex.epizy.com/19276842494.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_cbef07f97d6d4d4ea3b3329079223197.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/what_car_dashboard_symbols_mean.pdfIn PDF document text
    • http://waxuxeg.rf.gd/ketudasawojol.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_80602ad469a44ae6b8a2b5507d932618.pdf?index=trueIn PDF document text
    • http://kewazupo.epizy.com/common_english_idioms_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 4780 bytes
SHA-256: 5360cfd3da8d4d269b801309888754f81ca7b5894479b30249fea010457ab3c3
font_01_sfnt_off00011105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11105 14040 bytes
SHA-256: c781b9930fb35b5113a4b8f1e0485d5253b1555b432d0caed46d0677dc344565
font_02_sfnt_off00013b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B87 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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