Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba1fbf62b2d332c…

MALICIOUS

PDF

91.5 KB Created: 2021-08-03 18:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6e3794d3cb14c52aaff1850fe6ccedf SHA-1: 9f7b4ba21e519fcb8c2501ef3b7445ce5b187d8b SHA-256: 7ba1fbf62b2d332cf2859c738d726856516d22e979c5c5435e1054149edbed47
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a lure to execute commands via the clipboard, suggesting an attempt to download and execute a secondary payload. The document also contains numerous links to potentially compromised websites, indicating a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98a61c40e---bowunetulizusiwofigibiwe.pdf In PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/futasofomidaxakowu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b5de9d73f9b7bbf1322e5b6c878f76f8/rabiwekojovewobaj.pdfIn PDF document text
    • http://traviet36.com/upload/files/xebodawuwokumupap.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/luxikigubewometuz.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/57149242450.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a2ec45fd8---gipowefoxunatorokenofexon.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/8d7c23dceaeac4e1bf95ab0ae75d87d6/98190262978.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/jikuvu.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/57224762818.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/4620955076.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/60360969335.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/16490314306.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/9c020fd778a1ddbd2c8d2f4001cc78ad/zukotevo.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/putew.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/5206468ad64f5d0a14638c1abd2433ae/tozewiwak.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/e872627785cc73acfc9dd754a956b43b/wokiperedajitorobuk.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160706cee19709---lulolelipupixinowow.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/fea53d5483b152984ee8305b22049e04/38594273883.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ce95b842d---kiwuganubasalibirip.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5cd5ca9b259d078de62fcb333aba0912/jenikelig.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/23034791484.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c008dec804d---88281735975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=download+command+prompt+commands+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_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFA 17028 bytes
SHA-256: ed54f6bbe08bb951db408559e1d09bc90e92f831123b58234c5aafd0bd6425ff
font_02_sfnt_off0001485c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485C 10644 bytes
SHA-256: 4170b1bd0cf8988c359dd360020fab08afdcf1600aed7fd9e9833335759a1ec7

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