Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93affebabee6f42…

MALICIOUS

PDF

88.0 KB Created: 2021-08-09 03:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c1a502b81304082a9f4bd5b5c0b6a831 SHA-1: 51b91b1505186134db1ed4d8ab804b944dc8a4c6 SHA-256: e93affebabee6f42db87fa69cf01d9dfb63042e62b203d3aecb8d700cc7c9f74
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous URLs, many pointing to disposable hosting or potentially compromised sites, strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/23b94bbf2d731e098211a57ae5cc6325/90234975209.pdf In PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb9c0ec81e---29164658807.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/fedakefuvoxukojawasojiv.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/gojure.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b7d62beb04f8886628fda3613af4034f/xogesidefixine.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d5bcb5cbe---lepolufexoxi.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/pulefolapibizevutixova.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/81389171597.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/e007e61272b27eb89154a81ed81fd987/48068539307.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/dabejexozoxulirebupagon.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/68439853489.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/jujiwefisaxok.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/kavegaraseb.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0efe45a45c89bae875a838869ef2842c/60938604658.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/14272284104.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/jiferikewanoxixipij.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/c0f334656357de4ce703625551b6c26a/mafebew.pdfIn PDF document text
    • http://sieuthibds.net/images/files/45338423037.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/57703260592.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/82248758577.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/70012779590.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d8c20fd4b---48934024878.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/ddb7ad243b100467b9f96d9028f4bfe7/65950288901.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7698138b12---majofunibuzaniwuretafilu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/n7eqscm76tg6f43npo9nmmk6o3/88830791064.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd29fcab247---56101744314.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/68582229028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=touhou+broken+moon+piano+sheet+musicPDF 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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 10888 bytes
SHA-256: cca0369a72df5a24ce8c789031cffa45a238ddf51663614fbdff640b7d115499
font_02_sfnt_off0001233f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233F 17704 bytes
SHA-256: ba2bee9135eba8a5f0371a91461d3d11f3eae49dd653b647fa5275cd41b0e3ae

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