Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9df0dbde37ab65…

MALICIOUS

PDF

107.3 KB Created: 2021-09-06 01:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6ca95a844d216c698a3a6508a14c7d34 SHA-1: 7fe66583799ecc09d42419cd3830664d794787e9 SHA-256: 7f9df0dbde37ab65025359466e45ff125cee3863e797c6be33e2fef32de591ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing pages or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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
  • 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 http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/969107b01f2a537b307a6db2195ca57b/widolovijujetimobutazeguk.pdf In PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613535eb30a62---37236199059.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4875fae579---vekinujafelugi.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/5f3a7f6634d4443fe2d9f3e3d249ebcd/timiredibomusiv.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021851950114943.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/peroxujinadu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098df93eabc4---karapuvatesefiwu.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/78206955349.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mlc7lkh0dgqh0tci2159a6fjr3/71472582293.pdfIn PDF document text
    • http://veterani-pushkino.ru/userfiles/files/volowiruxunowutu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608668c4d5188---68164777109.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/wabokizoteg.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/gevadujiresinasovo.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/ribemebatuwab.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab007f836---nalafabazevaxo.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078be8cabbba---duvimamogedewe.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/menomotumopoza.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/6o8bd23lq7ej8n5avndd3vvu2u/firipetexuderusuzagikize.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4379245527---lejoratovered.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c24f0bb800---losudinivugosoxix.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/foxibesozavonaxiv.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071a0d1f2323---josirazut.pdfIn PDF document text
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/potaginoneduso.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81ae39b80e---komawif.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/95729273286.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/xulos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=liderazgo+con+proposito+pdf+descargarPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001520d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520D 20628 bytes
SHA-256: 98641eb48a9552c7f2b2589fe73232294bc9cb8ffd03c8933affdbc3d89091be
font_02_sfnt_off00018694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18694 10764 bytes
SHA-256: dedc9b4b1dfef10219ae966e78ff9cf2bf9ac226dc7c8240ec6a662eb288dc8b

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