Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fca17ee095306e…

MALICIOUS

PDF

84.2 KB Created: 2021-09-16 09:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f5812babf0306ebd4304f6d230bd4759 SHA-1: 7e9f5fc32f2a04270ae006321877a0ac3d0699d4 SHA-256: d0fca17ee095306e762fc7f3262e6cf25d8f61012b02062b9822e3a9437f5365
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and link farm nature align with techniques used to distribute malicious content or lure users into fraudulent schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/bawotisis.pdf In PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wenerixokovomadajumu.pdfIn PDF document text
    • http://terminsk.by/pics/files/59729418490.pdfIn PDF document text
    • https://chp-travel.ir/data/file/valeselubugiwofo.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/gunijevogefiraj.pdfIn PDF document text
    • https://0900107678.com/upload/file/2560432136.pdfIn PDF document text
    • http://agavietnam.com/img/files/61354652362.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/98273364051.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/bosetogox.pdfIn PDF document text
    • https://tekartltd.com/upload/files/nogezigoloxuba.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/43695156369.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/72654834773.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd8e211f62---badeximemasuxebodufa.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/bc8b408ce6a6bd09264035a9679f853b/52708119820.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/18824017197.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613829a016ded---92364842472.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4abf316d6---40384359898.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac84451ed5---butinidedotorow.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/11010518648.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/99997226289.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/75436675029.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/20725615289.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210909_7F8A2AE4E97F8E4E.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/24980969061.pdfIn PDF document text
    • http://caramelitos.sk/files/wilunilupumusiwabusoguwes.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/sb82n2qh6q3ld8famfc5kjmg5u/1541732047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+autopsy+of+jane+doe+subtitlesPDF 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_off0000dc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 20396 bytes
SHA-256: e666f722c449c6f34544ec80c31ff69eb006e583f70a3f18e3e333a3e7fa0329
font_02_sfnt_off000129e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 10940 bytes
SHA-256: 1d6a88004efdedb3ae7b36a3335e9adac048d0ea10bdf47fbd0d8a8775dfeb87