Malicious PDF — malware analysis report

Static analysis result for SHA-256 4226bf20636d3d0c…

MALICIOUS

PDF

75.5 KB Created: 2021-03-16 03:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4802fa06997e20082a91c387c2dfad32 SHA-1: c20b1af0b8a6d24ace2ea987d59b4763e116a889 SHA-256: 4226bf20636d3d0c62a7c18eeb5cc3d4705f5b1d9e9e2b0c9b7f932b60fc9eb3
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The embedded URLs, such as 'https://gimoguvi.ru/wix?keyword=joana%2527s+horde+leveling+guide+pdf', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://gimoguvi.ru/wix?keyword=joana%2527s+horde+leveling+guide+pdf PDF link annotation
    • http://zeputixov.22web.org/23821028956.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/ejagjdm/2469228567.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/780383165677k836.pdfIn PDF document text
    • http://kozlo.space/blood_white_bed_sheetsjxjcl.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/6jfiit5/nogunajogejiba.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/ejjhfgd/solid_wood_bedroom_furniture_sets_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/hbhggY1/best_free_police_chase_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/fhec4xf/89022570299.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/egiNhiM/warazipaxutakatuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/h33phhh/12995836145.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/Djchbhi/80207516241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_5ff99f95a0044e9e9d9d73e471e52cdd.pdf?index=trueIn PDF document text
    • http://tazigedefabe.rf.gd/currency_trading_for_dummies_3rd.pdfIn PDF document text
    • http://bijalefopate.rf.gd/almost_is_never_enough_karaoke_version.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_43d451b353bf4e0aac48bbffb542f208.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_9cefaf1051564454b3f5f04e135ef254.pdf?index=trueIn PDF document text
    • http://noluboxemefosa.epizy.com/78157838097.pdfIn PDF document text
    • http://turavewolap.rf.gd/double_stroller_that_works_with_chicco_keyfit_30.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_f6bed7860fe4459388ede11e36663474.pdf?index=trueIn PDF document text
    • http://demajipo.rf.gd/bangor_sask_weather_report.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_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 5384 bytes
SHA-256: 64a8c9d5d9bb069bf61d3e2d409fc6087b088642f71ae660c67ca0443beb7d63
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 10968 bytes
SHA-256: cdac8e0ed01f51f47c24e535b54cf2cc6444d0826cb8c6a220cef08e2ab83d0a

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