Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bccc591339bd131…

MALICIOUS

PDF

71.4 KB Created: 2021-05-15 10:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 382b1593ad6fd891cd95b1e622225d2b SHA-1: 03abe072e5b8dc756e077d4179d67a9b194a2930 SHA-256: 5bccc591339bd13127c7160c8573eac281c9fa98def2bf51c698e00bf0fcb987
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are on disposable domains and appear to be part of a link farm designed to obscure the true destination. The document body, though heavily obfuscated, suggests a lure related to product comparisons, likely to entice clicks to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=bissell+little+green+pet+pro+vs+proheat PDF link annotation
    • http://strita.space/fishdom_game_reviewsphsyt.pdfIn PDF document text
    • http://gemapijipepegi.22web.org/23290770735.pdfIn PDF document text
    • http://sakhavto.ru/baahubali_2_picture_videojsbts.pdfIn PDF document text
    • http://itdiscounts.info/shark_navigator_vacuum_replacement_partsctnhw.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/tasiduzufokulerudowj1d0m.pdfIn PDF document text
    • http://ridunculus.com/52281683594n6t2s.pdfIn PDF document text
    • http://togurebuk.66ghz.com/paraiso_perdido_filme.pdfIn PDF document text
    • http://goodik.fun/38085187645oxf6z.pdfIn PDF document text
    • http://obmenkalnr.online/32643458929j1z6b.pdfIn PDF document text
    • http://dolupusam.22web.org/redizizixemarovamanawe.pdfIn PDF document text
    • http://rastet-malysh.ru/xoguxotitinomotetiruwafohu4ic.pdfIn PDF document text
    • http://kersita.fun/will_tv_ears_work_with_rokuzylr5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famuxixisuxu.rf.gd/what_company_owns_epic_software.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_6ed182c9d22447b79e4b54f5df20a1d7.pdf?index=trueIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_bb6345decb9f4e1286f7645fd904f127.pdf?index=trueIn PDF document text
    • https://13dbc848-c95e-4197-a439-3ae2050b6ee2.filesusr.com/ugd/46bbe5_346ad21c3190415fa517281c45dd5b50.pdf?index=trueIn PDF document text
    • http://nalasorujuwasop.rf.gd/lamaxexunof.pdfIn PDF document text
    • https://7d39e43c-b8c0-4885-b371-c68c0668cde7.filesusr.com/ugd/be19e1_ce6b61528a834ca0bbbf026cb6399a1b.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_1b580bc565cd4bbaa34732b196593d95.pdf?index=trueIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_f6389251bb874666be5b323b2c59ad7e.pdf?index=trueIn PDF document text
    • http://xixujoteb.epizy.com/96985254884.pdfIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_49e7ecb5a6974bb1a06370560ecc5ab0.pdf?index=trueIn PDF document text
    • http://rofokosakesa.epizy.com/23621245714.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 5192 bytes
SHA-256: 61c4b80aa95502518b2d0716753fa3f44299b24b6ffa51d14351d81175d4e873
font_01_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 12616 bytes
SHA-256: f9758080e7a98ea32e7acf0f2835ec7c5d2807f22d6adae3530bf940ac4a49e0

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