Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e82d939da3f5c1d…

MALICIOUS

PDF

90.3 KB Created: 2021-04-04 14:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cbfeb808f8466d6d952411b915df34ad SHA-1: 729679a9cbaa8d987da8a1dc7503207805e9dd02 SHA-256: 2e82d939da3f5c1dad810d24150dd499ae798405bf591d6b954ff94434c5b9e5
126 Risk Score

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 0.9985

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://seumenha.ru/award?keyword=frozen+shoulder+rehab+pdf PDF link annotation
    • http://fodamibokaf.66ghz.com/20083070166.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/the_major_cause_of_death_in_most_burn_patients_iszn2on.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/federal_holidays_2021_calendarpedia0klp1.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/jcajbig/mulisuzofovabuk.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/iShehjV/iowa_80_truck_stop_barber_shop.pdfIn PDF document text
    • http://levantemosaic.com/bipototakawusuloxiwevuf7gwxj.pdfIn PDF document text
    • http://dularifok.22web.org/fha_purchase_agreement_addendum.pdfIn PDF document text
    • http://mexicotop3.xyz/cat_and_rat_games_freed1vy2.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/YfjfihS/home_assistant_alexa_integration_without_cloud.pdfIn PDF document text
    • http://bettermoneytips.com/bhavesh_joshi_full_hd_movie_filmywapl8k99.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/WhiYHAY/xusizobe.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/ck9aHha/is_my_ucat_score_good.pdfIn PDF document text
    • http://heleogose.online/486768329349mdeh.pdfIn PDF document text
    • http://busurman.space/download_flip_the_gun_mod_unlocked357bb.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://futivel.epizy.com/spring_boot_jdbctemplate_log_sql.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606325b7-afc8-47b8-a6eb-2fce449e46ec/second_green_revolution_in_india_upsc.pdfIn PDF document text
    • http://mevodazef.epizy.com/96958403713.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_a0041e819a6b4b988290b51cc44aa6e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6840ac-65c8-472f-b02a-e2658ff072d3/pelurofadetumiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb7bfda-96ea-468b-bebb-31b7d3a51f2b/91803740476.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_7849fcf9fb444ff28ab4ec6174062eb4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0465a305-7fae-45aa-872b-fb75f32b022d/zero_belly_smoothies_recipes.pdfIn PDF document text
    • http://vedomoz.rf.gd/99022954687.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 5028 bytes
SHA-256: 2dcc90414a1cac3836dec8f2fe10e6659dacfc531e3e0bef0a5470086194bb40
font_01_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 10500 bytes
SHA-256: 2a06bc1fcebcd341032de30b967613a4d2c89b8655b59622fa0fedec958494f6
font_02_sfnt_off00013699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13699 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00014bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3