Malicious PDF — malware analysis report

Static analysis result for SHA-256 74728107fcb5830f…

MALICIOUS

PDF

135.7 KB Created: 2021-03-14 04:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 406b81f3893db5bb845755cbcdcb4d7c SHA-1: ec74b1284601affe97fbfc69f5233f4909efa05f SHA-256: 74728107fcb5830f55983bb3839f060e988dd85488f90bbb964feebeba47f309
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://ponafet.ru/award?keyword=amazon+river+map+pdf PDF link annotation
    • https://cdn.sqhk.co/rotexopapi/HnDjbih/sejemivevotesolex.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/3jgNqjd/snowfall_season_4_premiere_date.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/the_thrill_of_the_chase_a_memoir_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/Pphd0jf/makomegimonajopoxo.pdfIn PDF document text
    • http://finonit.mypressonline.com/canon_speedlite_430ex_iii_rt_manuale_italiano.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/K2ijBid/3d_boat_parking_racing_simulator_mod.pdfIn PDF document text
    • http://thesalle.xyz/corretor_de_gramatica_em_ingles_onlineahadp.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/59027163720.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/ibhajwZ/big_chicken_wings_restaurant.pdfIn PDF document text
    • http://banuduxirodeb.mypressonline.com/sinikipogadejakiwiboled.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/d1hb5nP/46899014980.pdfIn PDF document text
    • http://zootime.store/nogobixuwaxinm27l.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/aa44b158-b17d-40ad-9541-9d94fd4f316a/is_the_sony_rx100_still_a_good_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/jufados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d1de77-75e6-4d8a-b1fe-be134a90630d/xomopunowazusijovup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7911f9bd-802c-4fc7-a6bb-c48dc776c6ab/kobok.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/36512825262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5ccd1c-d05f-4749-8b3f-fe3e3fc34fe7/25981136101.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/nuvulumi.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/92928069039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad66fb8-b156-4c46-bb65-dd1cd460c569/dixie_chopper_mowers_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/accounting_ledger_template.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_off0001cc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC28 5076 bytes
SHA-256: 9b1e57e3163ac5af89606eb2565feb4297ad6b6a95f39d472eca4252136dd727
font_01_sfnt_off0001dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD64 16748 bytes
SHA-256: c54fb3ca95f946198d2076004ef7f22e4475e79b5a1645292fe6d72f6fbea6ee

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