Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe0291cc85151d0…

MALICIOUS

PDF

86.6 KB Created: 2021-08-10 00:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05e4035a63bfe90c790e1d68aa2cbf2d SHA-1: 3c327b1c69432d5b7c0835173c396d209cc6a744 SHA-256: 6fe0291cc85151d02f3b88d840a544496c3b13168942b46cf0f040b9cb787081
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of external URI heuristics and link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://shoppingplanet.ro/ckfinder/userfiles/files/resilegadijed.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a992896dd99---66643100563.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a591a64e9d2---lopizaxeluwijujikovaxaj.pdf
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/62800529625.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4742e06a3d.pdf
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/36406342386.pdf
    • http://www.520amis.com/upload/files/71769950716.pdf
    • http://castrolmintabolt.hu/images/upload/file/dizenojuwepokefesuv.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/8208103799.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607361e5e63d1---tenekitapuzegetetejexusan.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bjuogh6li467iaipulfb0om2uf/19968374806.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qab0q9rtvvsve5bvtvrmt4o6qp/tovinu.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/007460f83f6abbf215d33b2763a2e073/14331723947.pdf
    • https://kovosluzba-praha.cz/res/file/39405632929.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c934e1aa618---74338953480.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/3f5fb8e5ca3b8a435409b7f5dbf9d6e3/81420238806.pdf
    • http://casier-a-bouteilles.com/file/20540980764.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/7f5504c5083a44c0792709c72af1e868/kilujezojipeka.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/be09140315075904233e6f8587de4a6a/17578657659.pdf
    • http://movementlab.dk/userfiles/file/ponezopugujaragorirajis.pdf
    • https://cherrychile.cl/cherry/uploads/contenido/files/migosorigeguk.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/losuxowagovex.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vchfts17kj541nbhmc8ccn7007/15519816098.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/50bc0771c873f0ac2c9fdd80ed2e0f6d/22255248440.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=whirlpool+gold+series+dishwasher+not+starting
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 16792 bytes
font_01_sfnt_off000106f9.bin
5207eb127d5cc41ab4f4be81976b6ebbc6efa5a2e08053378ac200898966ca4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 10748 bytes
font_02_sfnt_off00011f76.bin
237eae01f22b538567079f373d4ad003cede45e7c3e7f4507fc580b02bcb527e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 16964 bytes