Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f22fe437263759…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 23:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c7c1920096721fdaf130408489fbe91 SHA-1: 10b3a907d294227544f8e9c45cebc7687a6a8d29 SHA-256: b9f22fe437263759c3e51f449a248727968c9c02f11cdbb5e02159e0c8c6ec15
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://midufefew.ru/award?keyword=chris+hemsworth+workout+routine+pdf PDF link annotation
    • http://fixmarker.fun/black_and_decker_mini_fridge_temperature_dial5v4t3.pdfIn PDF document text
    • http://geniusenglish.space/understanding_computers_today_and_tomorrow_15th_edition5mlhg.pdfIn PDF document text
    • http://vibomolivizim.iblogger.org/nuzani.pdfIn PDF document text
    • http://kodavuviguwu.mypressonline.com/materiales_metalicos_ferrosos.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/dAjgCb9/35089543175.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/danavo.pdfIn PDF document text
    • http://itdomen.fun/10200370248m1azs.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/how_to_reset_maintenance_light_prius_2013.pdfIn PDF document text
    • http://all-gopro.com/fipiznwv4r.pdfIn PDF document text
    • http://spoonnumberone.xyz/the_raid_redemption_full_movie_download_moviescounterj1lfk.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/jcIVSha/fopogibunupuk.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/is_war_room_based_on_a_book.pdfIn PDF document text
    • http://indital.space/pathfinder_strange_aeonsm0ygw.pdfIn PDF document text
    • http://i-men.ru/how_to_convert_keynote_to_ppt_on_macou32v.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/a7eb6184-e39a-4865-a3c1-36e44997436e/what_is_dark_they_were_and_golden_eyed_about.pdfIn PDF document text
    • http://zakusomob.rf.gd/rewapebavazomidujativ.pdfIn PDF document text
    • http://lotawovuvowuk.rf.gd/legend_of_zelda_minish_cap_kinstone_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e7cc78-03b3-407b-b4e0-493dad8ac5d2/45547534958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51047b2-2287-4ec2-98fc-b841c8ca30b0/24796498593.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000f189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 5100 bytes
SHA-256: efb463be0f7184830ae7f1abeffae3b3bd618dae5be02beeeae4fa61d2567c00
font_01_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 10844 bytes
SHA-256: 612bd68db37584857df50ac8e735f671850008defa0c3ea69e984cb8a64ffe2d
font_02_sfnt_off000127cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 16392 bytes
SHA-256: 954f30c1cce2e3a00f07cb0ababb04bf86a3a3c34ed8da2fc782bdc014231390

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