Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f05b8bc59e73c32…

MALICIOUS

PDF

87.3 KB Created: 2021-07-27 15:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f899bf383404d9e76dce117928b0c4c7 SHA-1: fa40a5a0804c027453e1196d2d44836dd4615117 SHA-256: 0f05b8bc59e73c3268c6b4b647d4e2f6de90e361b5bf7c114708342f103f0177
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to other malicious PDF files, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4104

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://oreade-breche.fr/userfiles/file/41141885451.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/mn12judp2tjbe82b00rkc9dcjt/73157210932.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/cg6t8i23r0bg4s83lltbgje5c5/lotevabezu.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/55491912397.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/6a876170ce7c2ff44ee8494306b7b4d3/dirixoxawekamurefijo.pdfIn PDF document text
    • http://adveotec.com/img/file/38952362133.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/82905330219.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/86025209905.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/7835939230.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/dofagik.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/makimixelejetikem.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874c5b32a1d---91282080909.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/tp291obsniqpg22qvcs3telhtc/83891799171.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/58117484918.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/27ceb4a60811b9ac5e3a076998b1d814/77993223218.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/40503405460dde802bb70b.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/14295247722.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2112dde473c8ebbc724abd2ca28c9d3a/xalufek.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/99dd55a206303ba7c58591c20a586c56/vefevos.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/rikipulote.pdfIn PDF document text
    • http://meta-min.com/files/vobusujejujivuro.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/rakuguzaxanidaz.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/lovejizalebube.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a69b06f07---86955556791.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/73319826718.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ea9b734c5---15979085224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ejercicios+de+simetr%C3%ADa+axial+y+central+para+secundaria+resueltosPDF link annotation
    • 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_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 11164 bytes
SHA-256: 2b1103647d28f62441b522557f4df76b0fea6d1e4963837f088f6ca4120c1b7f
font_01_sfnt_off000101a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 17636 bytes
SHA-256: ca2d735aed4bce208889d473226ebb909a4b0b0aa0b37978fb10ee913fb9d3be
font_02_sfnt_off00012f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14718 16140 bytes
SHA-256: 33a9b2392399215f84150f50d22e9b37947cf59df706dcc52fdb6a16fcd7b98c

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