Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fcaf63224cb6bd…

MALICIOUS

PDF

93.2 KB Created: 2021-07-01 13:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2e14f16ef817fd6e3c7db0fd552c48af SHA-1: 7020fd03fa28a43478879d6c87d782c46b827d1e SHA-256: 29fcaf63224cb6bd7884666f327f2734d7468a246ab15fcb2d2a43b32b5cb607
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, containing numerous URLs pointing to potentially compromised CMS upload storage and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://west-holding.com/userfiles/file/13925585527.pdf In PDF document text
    • https://betalinktech.com/blmedia/file/bexovidod.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17e09668bd---8553794982.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/xutuvuz.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/46682302466.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf08315d4---mejotiximifexigiravi.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/tagawopuwabinebumejeva.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/otbcbklf4k2bqr28bngvbuvj44/69932596043.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/f80q5456srbk7onn636vfdhab9/vogevoboxa.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/46766608722.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac2c7e936d---39450149240.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085aec16f89a---sadekajuk.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/wazabinowew.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/qc201bbj06g3t5agrj0b8qj30k/gafezasuxena.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/7bd42bac15db2f536c4045fb67e1e45d/74411720499.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/33112774275.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/s715iaoo5dn1e4smphjqre5le1/24099168661.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/05c9b8868af2e6c084e3048189b65161/voxatikesaramajuduguxalit.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/dfb064f23d0d2667cb386a8f950d9c14/votunotinojikawerisad.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/32196545489.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/cot969e2ng5hnkbbqd4brjdquc/donepikuxuzalinoxoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=select+case+in+crystal+report+formulaPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e4ea7e69e8d0bac2321eb3fd59b49e02/zoxazasuwikum.pdfIn PDF document text
    • 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_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 10932 bytes
SHA-256: 983a75ce10211127e4601b1fcaae8bba36c53763241aeb6d65597cd4e4db667a
font_01_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 18692 bytes
SHA-256: d65e6a5ecb317bf8a00a810f7045037b84bb979591dc363d7f1d786df399a9cf
font_02_sfnt_off00014f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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