Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74d12ac1b991a67…

MALICIOUS

PDF

82.8 KB Created: 2021-03-04 13:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2a3e04e3a6a593da60bb9dca85f9e8a6 SHA-1: b336101db7d4572f1c02e63c03665a36b495da93 SHA-256: a74d12ac1b991a67af1cc9cea6ae4e0d3ee48bdc7ef9bfefa885a5d05185e2d2
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 numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a tracking or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=what+questions+to+ask+girlfriend PDF link annotation
    • https://cdn.sqhk.co/wadelovelo/ijghhd3/snake_vs_block_skins_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/2iiJijq/words_in_a_pic_2241.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/snUgfii/ordinal_scale_sao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_5fe7a8bd4c77d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5fd65c37b1642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_5feb1d9a37f63.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/uMDNhdx/99432536560.pdfIn PDF document text
    • http://supportcopyright.net/what_is_the_main_idea_of_dr_kings_i_have_a_dream_speechlymsv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_5fdbfb92cb09a.pdfIn PDF document text
    • http://tohld.in/is_cyberpunk_on_ps4_that_badk0epz.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/88703059752.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/iaibhdP/stunt_rider_drift.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/dkdhgq7/56018886546.pdfIn PDF document text
    • http://baltika-trans.com/kundli_pro_filehippop2ea8.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/K9ghfig/venmo_canada_app_store.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/killing_the_black_body_chapter_2.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/96115089877.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/zero_belly_smoothies_book.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/xoweratopevamonixixopa.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/48941650018.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/yamaha_dgx_660_or_p125.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_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 5372 bytes
SHA-256: 57ef4dac040489dec96907cc0d1416aeb88410a9e087fcd8d4d76ab80f3350d9
font_01_sfnt_off000118eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EB 10796 bytes
SHA-256: 5030cdc72baaf6b7f2a47c9c3ee32de129690bd97abace8a43160b5dc7dda474

Open this report in the interactive analyzer, or submit your own file for analysis.