Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bbe529da5ecf2a…

MALICIOUS

PDF

93.2 KB Created: 2021-06-13 17:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5089eb3b33887a7933bcfa2637593f5f SHA-1: 6f500ad7c0a6084ec0d11e5a15e19c7441e865cd SHA-256: e6bbe529da5ecf2a4e3849d4a1123d96ed29194b3c3eee7fdb49b963f6892ea0
156 Risk Score

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/uplcv?utm_term=yeh+jawaani+hai+deewani+download+torrent PDF link annotation
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f44c28a9b6---87676999313.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/suxizarefofabagivag.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/e4t0bud9qq89tltii0c6a1e63l/16058079707.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/45376540876.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8f27a273b---terop.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609629b66690a---futuwojuvanaguwadowoj.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6a6ba0e07f0985833462ddca9d44fbf9/gusowapagep.pdfIn PDF document text
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/887f37a2e6165ef4ee4a4a83df67623c/teregukotesaj.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a509156bd2548afbbca846911439233e/88720940348.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/lonasolovet.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e3c274648---segidapabuw.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/59997639356.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160973a7720003---rotero.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/q7eoij6jo855smgbmd208a6660/68549335953.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/qe8u0a637j3vttfsqnviksorm1/riraxodu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/84925945f291ae4fad260cea9f4c3039/87132508716.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 4652 bytes
SHA-256: f9b3ed619695bbef4bb0061c14293e6165a4cff52a9e7789e5c2f6ef681509de
font_01_sfnt_off00010af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF9 4884 bytes
SHA-256: bec751c2c6cc6c71c636c445a450da5156b715facf69e5ed7601b5cc4fac522b
font_02_sfnt_off00011ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACE 11368 bytes
SHA-256: ddd7c7a53ef732aae7e0910096491d95d17e95263d36572b67f59551592dcb56
font_03_sfnt_off000141e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E8 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_04_sfnt_off00015701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15701 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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