Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3eb8bc7f47b3f2…

MALICIOUS

PDF

80.9 KB Created: 2021-04-06 17:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c8893aff29b0924faaaad0f2f28a6e18 SHA-1: 2143837362c98f16298ebaeac4f04d9c8b119ad3 SHA-256: fc3eb8bc7f47b3f22c3ccc3db1fad44b22a4af1af79a44fda84d290c52c26399
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/award?keyword=alzheimer+s+disease+pdf+book PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/AChbj9G/english_songs_with_lyrics_download_video.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/hdL4idn/fumibofakosilaselozewimux.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/ihje6hg/how_to_color_pretty_princess_luna.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/jhi6mjf/mirozejuxukopozibulejowu.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/ielts_reading_listening_answer_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/iiigiaL/civil_war_wild_west.pdfIn PDF document text
    • https://cdn.sqhk.co/muzewutipifa/MQhjeic/sapumo.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/broiler_production_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/gjSs5jg/70391310397.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/20808385246.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/hhcvkgg/bhop_csgo_gametracker.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/jdjavjf/14906785857.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/aVtjigy/femizerukafovuzavejetev.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/what_are_the_two_types_of_report.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/C2iakY0/itrack_hockey_track_hockey_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/EhfGggW/retukosezevadop.pdfIn PDF document text
    • http://pidusejop.medianewsonline.com/how_many_quarts_of_oil_does_a_riding_lawn_mower_take.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/ehbsING/baby_tips_the_ultimate_parental_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/momajuxu/iUji6gj/agile_effort_estimation_template.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/taguxif/62376333084.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/baby_shoe_size_guide_eu.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/13392436545.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/90549136054.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/11067473059.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/7161242446.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_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 5524 bytes
SHA-256: fa487cb2cbcda1d8213be51d1fcc04658c356ed73349eae1a6f8e5dce0fb6f7f
font_01_sfnt_off00011101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11101 10884 bytes
SHA-256: 990f8c4c8be09c2599a0bbe3937a7d14710b0d95caccc0282b7c64d2edcb26de

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