Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72fd0de6d25886c…

MALICIOUS

PDF

78.5 KB Created: 2021-04-29 15:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a277c3fa7f5824235e886cd4fa2ea2b7 SHA-1: 5ee926fa92c077b136cd457e6306ef9bc224013f SHA-256: c72fd0de6d25886c99ebc724d5c55b46f40e6aa270171044d461c54c666de3e8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=husqvarna+372xp+specs+acres PDF link annotation
    • https://wufotojinelulut.weebly.com/uploads/1/3/1/1/131164112/4434891.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/0je2Bhc/game_capture_xbox_one_x.pdfIn PDF document text
    • https://nonaxoboru.weebly.com/uploads/1/3/4/4/134467623/dbcf04952d.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/hghjjaZ/todekazoluk.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/5919848.pdfIn PDF document text
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/kisulorakaxurodadu.pdfIn PDF document text
    • https://mulodetudujidof.weebly.com/uploads/1/3/5/3/135325190/tuzufimekodaja-bupofiwirej-nelatovuveta-jejizogizedavo.pdfIn PDF document text
    • http://boost-shop.xyz/how_to_learn_summarymcr64.pdfIn PDF document text
    • http://bluetea.space/ticket_to_ride_board_game_reviewcz43x.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/d9d0bcde2.pdfIn PDF document text
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/8a869910ed77f.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/ijqkjhp/call_of_duty_modern_warfare_zombies_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hRhjqMD/numolaf.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/7097734.pdfIn PDF document text
    • https://bikizulotozenap.weebly.com/uploads/1/3/1/8/131860645/gadebisotod_gipasa_zobumoxiga.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/hblh0p0/45372562684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e333a68-c105-4cdb-b4bd-ed50ee763e18/used_nespresso_machine_dubai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68e8312-60a5-40a8-b642-04dd6343bdd2/defiant_spin_to_lock_electronic_deadbolt_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc2511a-108d-440d-ac80-7df7e11b8b25/sepumine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d95434f-035b-4977-a418-a425df228d6a/55730110142.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_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 5484 bytes
SHA-256: 8f7b95a345af5b9daa1e8e1e67d64c13c9a31a87ab87555061a77f1c6b013b7c
font_01_sfnt_off0001067a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067A 11256 bytes
SHA-256: 84065287fa613cc06a081de34130d55ddad142b5519c1326e410f42f38f1aaef

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