Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f34d894cd713948…

MALICIOUS

PDF

79.0 KB Created: 2021-06-29 15:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f211ef23bc062548bc6dc8d011f87c56 SHA-1: 6f390104204aa2593c6eb7501f03facfdd957423 SHA-256: 3f34d894cd7139482d210e73f24074595d1a3232f54296fa2b07a0fc5bb8f5b8
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, many of which point to compromised WordPress upload directories. The ClamAV detection indicates this is a known phishing or trojan variant. The file's purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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 http://longarmquiltacademy.com/fckeditor/userfiles/file/93735717481.pdf In PDF document text
    • https://erdemlerkoleji.com/resimler/files/nezet.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/88cfd0f71b49ab4069b05ab71791193d/fozigosarewizedalon.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/98634ffe4f18cdc9e580c33e02a3ffb5/3918180579.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb634678332---ledobuneraw.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/korusokematov.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///nubuxu.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/90574f07b482f8c99d30209c5af49d2c/zesasin.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/85752463203.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24f49efd2---28310139424.pdfIn PDF document text
    • https://tcremich.lu/files/files/77695272647.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a240be74---tivar.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/cd04a4d5f85d33e22b7c9ba6ba65da5e/15547758911.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/3e0879b1323566e143caa6f347492970/zesozugurixaxufamat.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/tvrksogtaicdak9et1ilsd5dm6/59358229125.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f685da2a21---5126966668.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/lixuvatipikewanukunow.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30a195938---58635516960.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8ff215a1---jamananudofibidazu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76a49c4e06---93592231339.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/14dae7e83e861bb18e92041b7d7c8580/31519051749.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e1b5e365db5446125a74a2852f2f182a/kojerusedoguse.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/g1bop4vvuo1d2ocipukd5dta2b/90129977846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=7777+meaning+biblePDF 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_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 16576 bytes
SHA-256: ea0fb65f023fd321bd42b29d94bd2fe7cb85cca73b682983c6854e2ce29b0afd
font_01_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 17380 bytes
SHA-256: 94c92ba69a001874c40e5cf0204f3490559fb3e362fed95e235f7bfc406c69ca