Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc2489e830b33c2…

MALICIOUS

PDF

83.2 KB Created: 2021-07-18 18:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9d043f8f60d078ad18eafaf2632dd647 SHA-1: 3bf1c69ee4c9dcbe351d44d91fa1d092f0e916ca SHA-256: 9bc2489e830b33c2595e59e2543a094d2692044654f1d18a1d083cf377e09c81
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The PDF's structure and embedded links strongly suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

Heuristics 5

  • 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
  • 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://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/fe80be2481cadec988ac59c88bbcd0cc/lasak.pdf In PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/30h1me4c6467adh3rg4ka7s2p5/fabiletuk.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1jkoe2bbuuog7ldiclo43qnt6m/82291954585.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821d74bee17---pusaxuzumabukefanosijora.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/d6879efe7f793dd5388dafba96146f9e/96947406208.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/7515811395.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/dapipoxasuvawaf.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/bosikekolo.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/e896de397e89d9fb558b01ad74bc5913/vorejakegusaxupav.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/xofetes.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/moxepek.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/sinotalakadokigigalasoru.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/76126145937.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/45719296336.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/folevasinaxokaxereguwav.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf5e89120b---sijefuziralulow.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b494125e77b---46277618481.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/nojupa.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/gufasabexafanosivinugim.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/11560848872.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/405b0ec77c74cdff73538f0ff344932b/71077992643.pdfIn PDF document text
    • https://rcot.org/userfiles/file/gapitimonutizuza.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16096d4aebf707---vogigebuvuron.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=english+puzzles+with+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 10640 bytes
SHA-256: 23756db3d91a3579813d585bf3d62c8fd728ea635e43385a8d6a74cc0b206fda

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