Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfee2e4a2b73d78…

MALICIOUS

PDF

76.4 KB Created: 2021-03-28 10:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d1f9cf12cc85a85c318c13541a81f41a SHA-1: 3904d0131f44c5bfc06475e38f69bd3da58fa664 SHA-256: 9dfee2e4a2b73d788cc325eb9ebd51ef4abd9784677d5f53be00ac4ab3147300
186 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 0.9997

Heuristics 6

  • 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.
  • 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://fokemale.ru/award?keyword=albinoni+trumpet+concerto+in+b+flat+pdf PDF link annotation
    • https://cdn.sqhk.co/kibukumivu/Rjchdid/junewabisexegirabofo.pdfIn PDF document text
    • http://bluebadge-support.com/ludunedimalitfswq.pdfIn PDF document text
    • https://patoxudiza.weebly.com/uploads/1/3/0/7/130739147/fedopurojuw.pdfIn PDF document text
    • http://yachts-4-sale.com/total_war_warhammer_chaos_corruptionor4qx.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/Nos5rij/404_error_website_template.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/sQje8ia/76457154842.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/e26jiyb/tadiroxamatiluresi.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/ghNgfib/wholesale_licensed_sports_apparel_distributors.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/b2iibjh/xokepale.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/6U46xAx/leduloripazib.pdfIn PDF document text
    • http://mugedly.xyz/motedigo4qaiy.pdfIn PDF document text
    • http://hellesypakk.online/ruger_air_hawk_elite_partsimsn6.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/ijhiifr/34219783243.pdfIn PDF document text
    • https://nuwusiran.weebly.com/uploads/1/3/5/3/135321198/pejukibimulim_zovedep_batuporulitile.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/vjgqMNm/90133877971.pdfIn PDF document text
    • http://shtangye.xyz/57084198758n6y4f.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/pzvphgh/64334536175.pdfIn PDF document text
    • http://marafonsport.site/replace_keyboard_dell_latitude_e7450a6b2d.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/MaBZfjf/crashing_season_3_cast_kat.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/Z4GpWyv/96471842208.pdfIn PDF document text
    • https://cdn.sqhk.co/tulazofava/gcgdid3/ninojurelativu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 5252 bytes
SHA-256: 09f0cf78a5d298666631dfce583f939be944e26370d0eb2cfff402b56f013458
font_01_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 11316 bytes
SHA-256: 43f5a1b571d275b26ac9d21d8dfddfa84c1daff0acab7602d6edffd886ac55b9

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