Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57a24abc12b7075…

MALICIOUS

PDF

72.6 KB Created: 2021-07-02 00:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4b44ff6bf33e0593bb3de3938577b75f SHA-1: 6ebf8e35cad6e9cd2bfdb176bb4cd1aa68325a79 SHA-256: f57a24abc12b70756a49b0a3fe6da839c71ce8582aad06cf7315e4db63d2bfe6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://finatwork.com/userfiles/file/zirafufuwanalenesade.pdf In PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e09a582d5---93257289850.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/f653add4ddd06b7bb86bc25fcabd69e3/femoropetasisolosudex.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4555a69674c70fc6f47cd450bc241b20/loxulefijas.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f64f5c8316acfc97bf9db1eabe70ae61/wolofasisuwojavemazakusax.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607555d2dec19---filawiti.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/m3md4b2uoiig1gtr47upo8j263/fevijirinunesudi.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5039eb0f36---21086186961.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608684d80e96e---77366442671.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/02biq6ro09rbuacl9vt9r55l4b/76677924740.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/69495498645.pdfIn PDF document text
    • https://equinox-e.com/upload/files/jojivepadasopi.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d595844bdc---28573728143.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d1cf90a756ffa9c637f30d46fe4481f2/79989803387.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/lumabuvazasepavomirolefok.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076e11228947---5416739687.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3c0e48ecc---tonelusixukekiramebabopib.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/24979106338.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/pevevetitukoxijusamu.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab96b9574---55387028682.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/toxidupug.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/49e82418a125858b087df9eb9d481774/14046434983.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d34903658a0e358147fc6b0a1c7c2d19/66478856194.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/99646455787.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/88712c8f280bdd133630da5907a226dd/fajexedafovitus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=union+heights+theaterPDF 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_off0000bc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC88 16076 bytes
SHA-256: 1abf365aedb5f2976104559d2d3c9d7a2da763635bda044dd24e4a7fdd7bbd78
font_01_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 10348 bytes
SHA-256: cdea6f444532a3deb4c73de66d11f2ba8ca607cbd4db177b2238e272889e5692

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