Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1eab42708a442b9…

MALICIOUS

PDF

98.9 KB Created: 2021-06-11 14:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ca8f37f3a561188b9c2238558bb3b61 SHA-1: d71f6c729661f488e64eaa7b5bbb557718539939 SHA-256: f1eab42708a442b9eebdddc8b67fe1d4688f435c026ce8948793048978d3b135
134 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The primary malicious URL, 'https://drafthe.ru/pbw?utm_term=minecraft+mods+pe', suggests a lure related to Minecraft mods. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/pbw?utm_term=minecraft+mods+pe
    • https://sojurepew.weebly.com/uploads/1/3/5/9/135992925/8514865.pdf
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/6888368.pdf
    • https://sisufowikukutu.weebly.com/uploads/1/3/4/3/134311685/figaxupizijo.pdf
    • https://static.s123-cdn-static.com/uploads/4461201/normal_5ffbb6b5142f7.pdf
    • https://cdn-cms.f-static.net/uploads/4423145/normal_6041ec690b323.pdf
    • https://static.s123-cdn-static.com/uploads/4450356/normal_5fcc0a0787e83.pdf
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5fd72e85c74a2.pdf
    • https://static.s123-cdn-static.com/uploads/4367911/normal_5ff85a2d78ff3.pdf
    • https://wifusewaxoxuxi.weebly.com/uploads/1/3/4/4/134497844/lejobimufeneka_rosejiburomoz_mowaba.pdf
    • https://static.s123-cdn-static.com/uploads/4445731/normal_6006167ad6b73.pdf
    • https://static.s123-cdn-static.com/uploads/4420600/normal_5ff442bd82c9d.pdf
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6046f4f89f5a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wotasaful.pbworks.com/w/file/fetch/144456615/patawuta.pdf
    • http://gibabug.pbworks.com/f/46797446250.pdf
    • http://leviwim.pbworks.com/f/fezawukaso.pdf
    • http://sulegiwi.pbworks.com/f/epigenetics_david_allis_download.pdf
    • http://jejogitu.pbworks.com/f/rekejapawisudekuna.pdf
    • http://betifabito.pbworks.com/f/fallout_shelter_mod_unlimited_lunch_box.pdf
    • http://sizolasipape.pbworks.com/w/file/fetch/144577500/lisupiwubunewinu.pdf
    • http://mibegenav.pbworks.com/f/what_are_five_differences_between_monocots_and_dicots.pdf
    • http://kodalomibika.pbworks.com/w/file/fetch/144883092/medotizu.pdf
    • http://taxexuwej.pbworks.com/w/file/fetch/144648852/jisosixapa.pdf
    • http://kolasotosexu.pbworks.com/w/file/fetch/144415323/fivatigadir.pdf
    • http://lifelekufa.pbworks.com/w/file/fetch/144790710/bandicam_screen_recorder_for_pc_no_watermark.pdf
    • http://fatakalewene.pbworks.com/w/file/fetch/144517437/81251802578.pdf
    • http://zatesil.pbworks.com/f/best_online_photo_collage_maker_free.pdf
    • http://sozakuvepar.pbworks.com/f/dapaj.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_off00014272.bin
112a1f8df1d390bb9018f5d6edbd34dbe4f25c226bfa3e706a69433be320826a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14272 5276 bytes
font_01_sfnt_off0001545b.bin
e046cfd2bbfee84640e337ff8925fb26350ccb794573ba645cb5c002846c7eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1545B 12176 bytes

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