Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6f083b4fb938a4…

MALICIOUS

PDF

84.5 KB Created: 2021-03-27 19:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 024e9e1736f1232d8da92dfaadd3db30 SHA-1: 6dd603aae0e80d3c7e7425729abb967f3d109a7d SHA-256: 7d6f083b4fb938a4323124c8922bf093cabcd74179d6458862c5f2c7122223ec
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, many on disposable hosting, suggests a link farm designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

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://mezovuduw.ru/award?keyword=allan+and+barbara+pease+body+language+pdf PDF link annotation
    • https://cdn.sqhk.co/nomazotesi/kHYjchc/tavutubabelitujakak.pdfIn PDF document text
    • http://sun-italy.space/lukisoxofuwomora6nbej.pdfIn PDF document text
    • http://timelessdecorum.com/15108109437oicsf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_60040652abd3e.pdfIn PDF document text
    • http://reduslim-ordina.site/berodupofabaloforomuopl48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_604745cc1ddd2.pdfIn PDF document text
    • http://trenketo.buzz/zojiji2tma8.pdfIn PDF document text
    • http://bokugoso.22web.org/59281436215.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/gjhcoZ1/birthday_cake_design_for_one_year_old_boy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_600f03143e4c6.pdfIn PDF document text
    • https://cdn.sqhk.co/xaleteser/gxClcWD/purelodafuzatijazelepozo.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
    • http://rozabuveragavep.epizy.com/union_budget_2020_highlights_income_tax.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_609b0a74b0644119ab8802a83e3f87ba.pdf?index=trueIn PDF document text
    • http://nunalel.rf.gd/what_are_the_main_aspects_of_editing.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/different_types_of_heat_exchangers_and_their_applications_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/black_and_decker_18v_battery_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/chick_fil_a_grilled_nuggets_low_carb.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/pong_atari_2600_rom.pdfIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_366d30a6888d48609a900b83a521e9f6.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_175b0e6db77241618f06972843ae0837.pdf?index=trueIn PDF document text
    • http://kaguwetu.epizy.com/7883746898.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 5192 bytes
SHA-256: 3f847e691cf8598ed0f83b629caed6de16c6d916a560cfd2a3e73826049c5dd3
font_01_sfnt_off000104c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C9 22104 bytes
SHA-256: 6477b879209b747787584584bd96f96af073e61d68f83c44fd6a4543978fd9d8
font_02_sfnt_off00013664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13664 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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