Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f009e430b815c1c…

MALICIOUS

PDF

83.4 KB Created: 2021-06-27 01:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e61e6d72f9174f4b19fbce639aab43d9 SHA-1: db083bf57e2ddd63b40ee0e84569e9fea3b806f9 SHA-256: 8f009e430b815c1ca2b6e1a405e62381e978886c86a97ae8c766926689274641
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malware or conduct phishing. The presence of embedded URLs and the overall structure point towards a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160703eb160259---xoviruxifikufukobedazot.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/64ea70d8a1ab595fc54d760a3fc2e9de/88182006512.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb7e676cd---puvifoxofosipudi.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806e7c14558---lekeg.pdf
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kerawinuz.pdf
    • https://windsbs.biz/files/file/3164964766.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e3iqmkaf9pjvmifhnfe49btb75/lotekava.pdf
    • https://planet-for-events.de/userfiles/file/pipuw.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/356ae9ecc22304889f1b5f86d78ba92a/14583211651.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607c089dcb8d4---36354347379.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160850d335bb3c---19800357100.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/r8kpep33g66b38gl2ngb8u5195/sukeba.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a879c506dcc19daa1c0f007521bfba5b/23183952145.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/qndqardnp76bl6n4pe5ekkhc3h/motalijogubilewosubap.pdf
    • http://weddingdiy.cc/uploadfiles/files/20210606_012035_6899.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/de2ceed923512be7f0e44352066356ba/2962366579.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b237c69a9127bf7d2a1ce2525bebc830/7488777522.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/6aaaa9747c03eab5d576ba9cb1a200bb/51929649939.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/lm38d3u7ekb8c9r347f3gqdef1/kuwevejepi.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a9bd25f45---68102830058.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/e19ef45b400a194d72280e159c323884/45122356427.pdf
    • https://bisnismedsos.com/userfiles/file/fudolesip.pdf
    • http://palenice.net/obrazky_clanky/file/mewaj.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-11/20210511230823755464.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=cctv+camera+quotation+format+in+word+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e496.bin
ece060f9d9f0f3cf91060bff791696ddf721d732fd7f38195942a19fb747720e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 16376 bytes
font_01_sfnt_off00010ef3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF3 16792 bytes
font_02_sfnt_off0001270a.bin
7cdf2b3cc4660e3ac187030d02b4c771de02046e397bacf12b3e3ff484c8d5b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 10896 bytes