Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce47bfbd4d7d793…

MALICIOUS

PDF

108.5 KB Created: 2021-07-22 16:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 77582342f6208d7ad722a07815e4452d SHA-1: a8c5915a3f311d27d978e44dbffb928391c74ec3 SHA-256: 0ce47bfbd4d7d793de732c26aaed815d051f6a03f30c2bd4f6da367aad007d31
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of multiple compromised upload links points to an attempt to host and distribute further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15027aa3ef---domeruw.pdf In PDF document text
    • http://wohingltd.com/userfiles/lijido.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/39bd2e463b3ad33c3ac24c518669814a/14946839599.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/32564258617.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/a46c4c14cc9b77565b7efa91ab3df75f/73922372063.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/e20af86d2b6eb3e5149e85525e814c3c/dubivigexa.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/jutuka.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160af7165ce3a5---xatuwomekirafufi.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/fezitoba.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/8017dbe96f69d656c55633ef33e31d75/43283661658.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/8hbpo8gnfu1iddrukmas3qovf4/19225910046.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/7shno4lrfamsp7chab5h1lnjhc/3182803767.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/0udrm7d46oi7oge3g4fba7hb5k/13039796972.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f0854288c9943990441bd886ebd3cf5d/87998738807.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/boxedegenupiromibosegita.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/38616247798.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1cdd97eb18d6c396c1c9a3169811de67/baneripipekatit.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/91415565921.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/78901518426.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/38787217332d749f548ecdf32c579617/86911446012.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/gosivusejagosalirewobe.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c515ac8104d---jotaduxikefo.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/47451698953.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/51959750500.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6075ee3747b2d41bb00f2ef9698d728c/wezerukemegafufogomupisi.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210720111857.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+wps+fill+and+sign+for+pcPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 10652 bytes
SHA-256: 31c7db12ed6ee97a27cd175b11c1a6518c5c3b39fee9cf1b127c7d225f43bc96
font_01_sfnt_off0001459e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAF 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990
font_03_sfnt_off00017395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17395 18204 bytes
SHA-256: 5de0eff8faa039092b0c7d0be9b9836801ee379976048d50511400076d0938ba