Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e346830c85c5be…

MALICIOUS

PDF

81.2 KB Created: 2021-03-16 05:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 505ae2a3a7fba95cfe1696f6942b1a42 SHA-1: b82590ce211220c1af5baaf69227a2f5ed00cfe0 SHA-256: b0e346830c85c5be1ce19d5f198164043dbc4e0d62aa20ea03d6a651627d3670
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a lure to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=1970+ford+mustang+mach+1+specs PDF link annotation
    • http://bivaxosufuxibo.mygamesonline.org/the_7_habits_of_highly_effective_college_students_sean_covey.pdfIn PDF document text
    • http://aicberg.net/1979053782158tmc.pdfIn PDF document text
    • http://retoxen.mypressonline.com/68726132596.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/Ffhchbn/cake_decorating_design_ideas.pdfIn PDF document text
    • http://show-visitor.xyz/35643532837swn3d.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/dNvSFGr/second_grade_math_sheets_subtraction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414153/normal_5fcf313e5374a.pdfIn PDF document text
    • http://creditpm.com/74048498891b5yje.pdfIn PDF document text
    • http://getveran.site/82751131416jlaa0.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/gcwjhwF/good_rpg_demon_names.pdfIn PDF document text
    • http://polfact.site/76221957028hmch4.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/jOsjagg/arrow_going_down_gif.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/59208027613.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/ajahjge/realflight_rc_flight_simulator_basic_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_5fd137aa4402c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_60348e5022c97.pdfIn PDF document text
    • http://usacreditcheck.info/denon_avr_x2100w_specsqmru1.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/iijjuDQ/the_new_york_times_articles_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_603fae90572e8.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/bjbcl7P/monster_craft_android_gameplay.pdfIn PDF document text
    • http://trujillostacoshop.com/32504975443wgtso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejusamipokera.myartsonline.com/who_has_been_named_peoples_sexiest_man_alive.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_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 5872 bytes
SHA-256: 89fe62b6a89cb3fa6703f36a256b62a69cd1875451cc6ac37a2200e7bcefc4cc
font_01_sfnt_off00011230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 10940 bytes
SHA-256: b64bb786b3ee5e93c276493c3709e8c6c0103466c2c0f73e9f8dbd12d62dadde

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