Malicious PDF — malware analysis report

Static analysis result for SHA-256 7960f06a5996ddbc…

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 04:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2fed86074572746acead0ee5934c9d2c SHA-1: 9ccdb2a18bac09eefe89034d4560d301d1b711b3 SHA-256: 7960f06a5996ddbc638520384984331e7aa9b972ee9bf3dc8331506bb23b8557
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing content or further malware. The document body is heavily obfuscated and unreadable, preventing analysis of specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc300c867b---69625464988.pdf In PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d43452833---nazozon.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/wopipabikelo.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/bup61emtp5pska0q5g0bot3380/getopite.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a47fd7975cd---fikedisapobolurifa.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da773705702---92811835753.pdfIn PDF document text
    • http://www.heksan.com.pl/file/69577030817.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/73948299336.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1621913108.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/e56ef858a9756de8028f445973b38e05/vamuxiramotofomivi.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1de7dc0a2b---68961979862.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/33608937738.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/cba72a92944b74f1123a3ade3f034fc2/87189970446.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/vsnk0d9f17plic5ov0ghbjjo63/68912826582.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/fatmnm84s457oupdguplv06u66/96407689755.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160741e11a8ace---beretexisevibasem.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/12498483577.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/mobebiwiwixazuripudamose.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/batazuxezefunoni.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/balogijubuxolufodazu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f027611695---jaduzoxazi.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851091d8c29---63171127668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=break+even+point+accountingPDF 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_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 10648 bytes
SHA-256: 32cabf512b03eac76b7d3c09f0f8450089dd8632dea1edd096a12b54897196af
font_01_sfnt_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 17024 bytes
SHA-256: ade0c6a000c52833ad8970f4213f8573bc183235f6fa0ef95070898a882dd468
font_02_sfnt_off00013405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13405 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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