Malicious PDF — malware analysis report

Static analysis result for SHA-256 928baf1c3ca09705…

MALICIOUS

PDF

78.8 KB Created: 2021-03-17 03:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d58723265c44ea033d203f16e716a8d0 SHA-1: 1dd05c56cc601ca09cb23897b3ba9233e5b0b1cd SHA-256: 928baf1c3ca0970554b54b55b82db51e73a7360aff3b7e1b830c4f5358073509
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for link farms and phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'quiz', directing users to a URL that appears to be part of a link farm designed to distribute further malicious content or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://botokaw.ru/wix?keyword=the+world%2527s+easiest+game+quiz+unblocked PDF link annotation
    • https://cdn.sqhk.co/pemenixa/iahgEGJ/59957816081.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/812eff.pdfIn PDF document text
    • https://dizogesutupini.weebly.com/uploads/1/3/4/6/134631076/loxulelomoduxabaw.pdfIn PDF document text
    • https://cdn.sqhk.co/simubekoz/hggc4ie/usa_today_nfl_picks_2020.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/1923977.pdfIn PDF document text
    • https://cdn.sqhk.co/nabotogemobe/j6kiazg/icing_on_the_cake_baskin_robbins_ingredients.pdfIn PDF document text
    • http://nutristrike-shop.ru/wormax._io_hack_extensionhfksu.pdfIn PDF document text
    • https://semuzotefol.weebly.com/uploads/1/3/1/4/131437619/pexefek.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/jikZShg/73066620998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_600f13346d7c7.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/Oghgjjc/download_game_tetris_offline_apk.pdfIn PDF document text
    • http://affilateapp.online/im_ok_youre_ok_summaryo01qz.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/abfQXPk/space_ore_idle_clicker_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/giicJpL/fmk_online_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/IcjfhjJ/how_to_draw_cartoon_zombies_step_by_step.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_601be8345704b.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/cb9783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_603cb4f260725.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vafowoloxesimam.rf.gd/69820269488.pdfIn PDF document text
    • http://kodeketabekem.epizy.com/bergey_s_manual_of_systematic_bacteriology_2015.pdfIn PDF document text
    • http://najenovatuxi.rf.gd/five_dysfunctions_of_a_team_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_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 5808 bytes
SHA-256: 1941e785beba72ada3389662154f14420bb934cb457d05b4c2992b3018936593
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 11420 bytes
SHA-256: b79bf1823edd55c7f3edb79bdc6161a4dc662ea76d1933bb328deb6b5cfec1b1

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