Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee1d30545ac12a4…

MALICIOUS

PDF

77.2 KB Created: 2021-04-21 09:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7e3729c7e2c85222c4940bda39ef3582 SHA-1: ef7013c55872b61d63522cae5a436b62e5cbf98d SHA-256: cee1d30545ac12a49f3d18fac53e195dc3e9492f0f88da3b3984107a9cb37da5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'vilenefex.ru'. The document body, though heavily obfuscated, suggests a lure related to cooking or guides, which is a common tactic for phishing or malware delivery. The presence of multiple external links and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=how+to+cook+a+logan+farms+ham PDF link annotation
    • http://lowabunuzoxa.getenjoyment.net/full_cfop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_606e749f65ca0.pdfIn PDF document text
    • http://ramerofebib.iblogger.org/adobe_flash_player_mac_10._5_8.pdfIn PDF document text
    • http://7lessons.fun/gusifwwvt9.pdfIn PDF document text
    • http://sepibigejakina.22web.org/15841475062.pdfIn PDF document text
    • http://profyhouse.ru/pisugivisokakulidanilupazfzh0.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/benin_art_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5fe52db6807a5.pdfIn PDF document text
    • http://physcoo.com/27988701105ili98.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/sutixaraxuk.pdfIn PDF document text
    • http://static-get.top/balfour_beatty_annual_report_2017aqcdw.pdfIn PDF document text
    • http://bapefajavijofo.66ghz.com/lotenosagufusojavepo.pdfIn PDF document text
    • http://elinekici.online/are_all_uppababy_vista_doublezuceb.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/e3be9e73-a83f-4a96-9d5d-399b4e37dbbf/angelcare_bath_seat_pink.pdfIn PDF document text
    • http://lovinanijorabe.epizy.com/neonatal_seizures_guidelines.pdfIn PDF document text
    • http://dasamixatile.epizy.com/gemuzikikogik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5664b960-a770-4e7b-b2cc-4d605d798ca8/23970617967.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/25179043105.pdfIn PDF document text
    • http://totegipokazize.epizy.com/netnography_doing_ethnographic_research_online_download.pdfIn PDF document text
    • http://menoziduwuju.epizy.com/canterbury_england_rugby_shirt_size_guide.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/will_there_be_a_new_game_of_thrones_book.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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5412 bytes
SHA-256: d7b4488b9e6341f72bd912ccfe3235e2092051c7060791d85827ceed89c34ade
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11656 bytes
SHA-256: 46d5ba044eb267bedb3e5fce7e8db3bbd3cef1d3a3c9715ecdb0678c42c10c9d

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