Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d67d5c35891676…

MALICIOUS

PDF

71.3 KB Created: 2021-03-03 00:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 396d6f0836081e014957dfda3e7b9940 SHA-1: d7d59b2d1fc0ba57292820264b62643f569b206a SHA-256: d0d67d5c358916768e18638b9ef441c5c5132653cba54d95246f519aba902097
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable domains, often used for SEO manipulation or to host malicious content. The presence of external URIs suggests an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=complementary+supplementary+and+vertical+angles+worksheet+pdf PDF link annotation
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/af1b2.pdfIn PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/1402958.pdfIn PDF document text
    • http://rezotu.xyz/riso_gr3750_service_manualm3aaa.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/70695275426.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/vaxuselapojibazudi.pdfIn PDF document text
    • http://robolab.one/last_wish_raid_armor_hunterabi9c.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/who_manufactures_toro_snow_blowers.pdfIn PDF document text
    • http://datingdate.site/how_to_get_a_replacement_1099-ssaxjjj1.pdfIn PDF document text
    • https://cdn.sqhk.co/susopavazane/jhHghdp/wrc_fia_world_rally_championship_game_free_download.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/vusojiburobile.pdfIn PDF document text
    • https://wojuguzibuliru.weebly.com/uploads/1/3/4/8/134896427/ligojebomarusu.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/Vibhgl7/68539101218.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/j6tiijd/jexid.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/ibLR1he/best_cafe_racer_helmet_and_goggles.pdfIn PDF document text
    • https://tamidotojo.weebly.com/uploads/1/3/1/8/131858916/fa204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/samsung_one_connect_mini_cable_3m.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/why_does_my_apple_music_keep_disappearing.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_off0000d99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99C 5792 bytes
SHA-256: 436b1b6c511b77564d43a2d717dd57e3d89165e2f150e2c97c094a17de803a6e
font_01_sfnt_off0000ed3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 10052 bytes
SHA-256: 3d6468d7f8c817a34b0f490e12eb6840dbb29d5b302db6f804b4861cff0eba6d

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