Malicious PDF — malware analysis report

Static analysis result for SHA-256 11de292a7c48b57d…

MALICIOUS

PDF

78.0 KB Created: 2021-09-06 07:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8190d302ea36542b2ec1c62314434de4 SHA-1: f69b0bc2e6d79479296346ed4a6899560251c1eb SHA-256: 11de292a7c48b57dc50332a2c43a210b083d7df533675f7d01073be2197e7f8e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution attempt. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress installations, suggesting an attempt to obscure the ultimate destination or leverage compromised infrastructure. The presence of external URIs and a high ML score strongly suggest this PDF is designed to lead users to malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://italianopizzeria-pg.com/uploads/files/91561167590.pdf In PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed157f2ee4---77381128132.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/bixutexegoza.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/zadab.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958c60cfa6a---88075011581.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/23808ec9be6d41b9b59a5d83682c5da9/11704477456.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/999c525c464c028bc509fdab0e63c929/22204620823.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/jetukewezunote.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/paginilowiruxafomev.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863abac5631---54605795570.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/335c38dbb5b99d475878ea3fa7530649/mukujome.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/91205663968.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/30147881504.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/5625ab2666df40c7178dd14dfa904aa9/dofijuxegejogixet.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/181d42fbf6b45f944de636bdc40554fd/xoferon.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3064e8bf7a3203c221845b3eeb64dc97/58573687834.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa015d317b---pezuxitabegiwonodinoxe.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f89908e59---juligilajaka.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13421372581.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/vufibabamoparupovuvuw.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0cb206207---78900049413.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/8999974937.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/wedezamulojimum.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/57355733576.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/7610e6b3f3af0aec22a8309242693050/kunadere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=captain+america+shield+papercraft+pdfPDF 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_off0000cae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 10796 bytes
SHA-256: c294646e2b7d5f14347471815d6225cf47d6d9f1c87fd811fc910edda0174f42
font_02_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 17924 bytes
SHA-256: 0966ca5099b1d689eae7979ba599d15a2fc2917affd18fe2d4c3f09e02334794

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