Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0826367715accd…

MALICIOUS

PDF

81.1 KB Created: 2021-09-01 07:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3b1d5f69e7ac4a4c85c8f031525e9b15 SHA-1: 1e8e18150500921d6ba5b5a74049a8e048ef7d8c SHA-256: ff0826367715accdf9c82227e03c00bffe1e1a9400da7f60083b6baa6e7892c7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting. The primary attack pattern involves luring users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763ec539bda---74461175133.pdf In PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/20764180057.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/73225320100.pdfIn PDF document text
    • http://poorclarescork.ie/images/68682997670.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ar4aftlb24ra43mr4v2uq94722/bikijisar.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/84808669333.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c8c6f911---zevafuzedixebemagi.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/45611675090.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16106eaf8819fb---77282764643.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec2ff528b6---wizunaxupedajutope.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/gomanilerenesijiwuxofisug.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///xagemaziketuzip.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/fb509906d0e3abf354b2dad4a7d64d87.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/fibuxagojuvebak.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lvutoq3fakp2upgnf7eb9lb7ee/tawivejolugewib.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/41735212007.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161145ccc6dff0---wazoxadukeva.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/cedfd8abf304f74611f08d88f9368aa0/26785010416.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/1de22ed0a70ccdc3e185cb70300116a9/kebujixi.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/1218665351.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/pajozejivowego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=can+u+get+hand+foot+and+mouth+twicePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 18240 bytes
SHA-256: c710ce65729f956ab04e94853b5e5a99615804163db0965e42b9b39aa25d6155
font_02_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 10824 bytes
SHA-256: dae43ecdd5379f30b2b2acedf5a8e8223cacbef29e5bb329d858923f31b83932

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