Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68ea7bbedac040e…

MALICIOUS

PDF

78.2 KB Created: 2021-04-22 23:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 969d9f59fae55dbabe22e34756583d4a SHA-1: 7eaaf2b3b6c000da91165b5f550dc72d84c9820b SHA-256: c68ea7bbedac040ebf6915c02942885c849a22ec446eef3afc8aa681d6248c95
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous embedded URLs, with a primary suspicious URL being https://vilenefex.ru/strik?utm_term=php+website+project+github, likely intended to lead the user to a malicious site. The document's structure and content strongly suggest it's part of a phishing campaign designed to trick users into clicking links for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://vilenefex.ru/strik?utm_term=php+website+project+github
    • http://jelusuvobirolen.mywebcommunity.org/facebook_ads_course.pdf
    • http://axecheat1.xyz/jukemigk6s1j.pdf
    • http://tronreserve.online/28340215688s0gs2.pdf
    • http://kodutizaga.mywebcommunity.org/59111467460.pdf
    • http://xamojopilupivo.scienceontheweb.net/dibels_8th_edition.pdf
    • http://kojijeku.mygamesonline.org/23859473507.pdf
    • http://bupitubegedew.getenjoyment.net/86788940302.pdf
    • http://vumogegotawugub.mypressonline.com/coleman_lazy_spa_instructions.pdf
    • http://mokenolovulonom.medianewsonline.com/biblia_romana_gratis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xupiwepe.epizy.com/91306311266.pdf
    • http://xegeduv.rf.gd/define_habitat_and_ecological_niche.pdf
    • http://nudoritane.atwebpages.com/55271344151.pdf
    • https://s3.amazonaws.com/dobesogum/lijef.pdf
    • https://s3.amazonaws.com/wanasuvedigo/kundalini_shakti_book.pdf
    • https://uploads.strikinglycdn.com/files/7bb3aacd-16ad-4161-9253-f58d8ffdc9a7/how_much_money_is_a_netherland_dwarf_rabbit.pdf
    • https://uploads.strikinglycdn.com/files/d6c1b638-da1c-464c-ae33-d8d54b7b7e8f/tudolasudamep.pdf
    • https://uploads.strikinglycdn.com/files/5b88d3ae-bec2-4ab8-8286-226ccb6eff44/what_is_median_annual_household_income.pdf
    • https://uploads.strikinglycdn.com/files/a65b80d6-d86c-4a41-8891-c57a3ecd9bc3/dead_until_dark_chapter_1_summary.pdf
    • https://uploads.strikinglycdn.com/files/aa9c1d8f-9c1a-44d4-80e0-03d2db4f15e8/xeziguxumiruxexajexu.pdf
    • https://s3.amazonaws.com/tonemakopinibem/adaalat_episode_1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27a.bin
f77c2578471b65da8d6e16a69b093fd7374dde5f4990e0db124051f6985e6d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 5260 bytes
font_01_sfnt_off00010473.bin
0fe763056a30a93fc39c8bd56558eeebae92ac2b817d55e9e11edd435a543a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 11092 bytes

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