Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ee692ac845349f…

MALICIOUS

PDF

69.5 KB Created: 2021-06-21 15:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6174dc61a72fefb6f550bd8352463d39 SHA-1: 9cc1007026057b6d916a8a3254d5fcf665c63423 SHA-256: d9ee692ac845349f231812e4dbac04813ea45e4c985d49a7606191b08ef2a544
164 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains links to compromised CMS upload storage and is structured as a link farm, suggesting it's designed to redirect users to malicious content. The presence of a visual download button further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/73747e01577c34003195491aa331b0bd/banolobalap.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/326a0d436f8398a774b3c763811f1853/38207599601.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160915a8387e22---59334064087.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6be95ff8631d33ff32b1c2a464566cba/funikegi.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/qc4f03p51pqeb2rk3dofcikou9/dogitojenuwunusesul.pdf
    • https://naucharts.com/ckfinder/userfiles/files/12912074879.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084258caa690---61557321829.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb75b05e1---tunegulojujozab.pdf
    • http://ligneus.hu/upload/file/demutebolaviworigizesedu.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160849980213be---weloz.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16085678de7e30---73133809533.pdf
    • http://fipjp.com/userfiles/file/vitibisiwuwiwofu.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/6semjd0a5uksjbsfeqbk9g6el1/47806779574.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/brhgdbdg1us26jhd8kv5r9k64n/xurojodigusovividapufuris.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbee5e4b2e---xelod.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6c02a3c80---38828391069.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3a6ec1a7f---luximakixoparofojafofi.pdf
    • http://assushop.com/userfiles/assushop.com/file/nulejuvosozapam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=stefflon+don+hurtin+me+download+audiomack
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c009.bin
3753aac1754dd5c475eb0e196857266421c4dee1ec4c1db198d2376224be6e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC009 5224 bytes
font_01_sfnt_off0000d1a2.bin
9b1657546440426bb383857180fcef06d129cc47b1ed1e6a274aad9feb0ae8e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A2 11484 bytes
font_02_sfnt_off0000f8e8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 4324 bytes