Malicious PDF — malware analysis report

Static analysis result for SHA-256 18216221a440bed8…

MALICIOUS

PDF

90.3 KB Created: 2021-03-07 20:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cece2998ff3994a8f3413680cb2ab511 SHA-1: e3deab38632ad3cdd6e018dc98d7ef9aa0aa4815 SHA-256: 18216221a440bed8319dbf896ef32ca1c9276cfafe0e1f0d172507b467631505
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 a large number of embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://lozipotod.ru/strik?utm_term=lords+of+chaos+movie+soundtrack PDF link annotation
    • https://cdn.sqhk.co/wadebekop/1giibhh/kowamesunulumel.pdfIn PDF document text
    • http://paganel.world/counter_strike_2_game_for_pcbgm4p.pdfIn PDF document text
    • http://healthyforczechrepublic.site/kelirizitadutokafatyofd2.pdfIn PDF document text
    • http://bigops.fun/68106720479cp7u2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_602638a4e5b79.pdfIn PDF document text
    • http://afracheat6.xyz/57059077324pdxuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_602c85b373487.pdfIn PDF document text
    • http://okrasote.info/geronimo_stilton_season_24i2av.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468838/normal_5febc3ff85bd8.pdfIn PDF document text
    • http://repair-foto.ru/98825023972drx4y.pdfIn PDF document text
    • http://comp-arenda.site/what_are_the_types_of_journal_entryomwic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468812/normal_603d1587be87f.pdfIn PDF document text
    • http://molotkov.site/fikih_kedokteran_kontemporer88vl8.pdfIn PDF document text
    • http://sfhgfje5df.xyz/825922380403e4o2.pdfIn PDF document text
    • https://wifusudufasebo.weebly.com/uploads/1/3/5/9/135992472/6807025.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/996390.pdfIn PDF document text
    • https://cdn.sqhk.co/pelemobi/Mkhe2Z4/harvest_moon_deli_menu.pdfIn PDF document text
    • https://defeluzeveloj.weebly.com/uploads/1/3/0/8/130873982/sixajo_rofuzafowegusak_kexob.pdfIn PDF document text
    • https://cdn.sqhk.co/lojegalivo/F2FJibS/jt_global_mobile_top_up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5fdbac0a93353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_6034408961894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_600f3da4243f7.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/Hjciejd/nedefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411701/normal_6003eb95b3466.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/hhefjdy/50422581244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417648/normal_5ff24d79c7fb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5fdc4ea684854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 5296 bytes
SHA-256: 2fa2bda57f681f4f638a472c33f5196de8ffac2a228d9b52dd07138a59256dd9
font_01_sfnt_off00013635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13635 11272 bytes
SHA-256: 14d193bbc28aac214cacc7011f724868322802224a746cd1032dcceb003e4625

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