Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3469c590196ddab…

MALICIOUS

PDF

94.3 KB Created: 2021-07-19 03:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ce9eb2b6aeedc19566b1d98586e2700 SHA-1: 3fea1eab42f603fbe45dcbf49efb1fd6086f00a8 SHA-256: d3469c590196ddabde64f29ab7a4bedbe06bac263512822917912818f28aa524
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of many distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine rankings or distribute malicious content through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dondepodemosir.com/userfiles/file/86561153702.pdf
    • http://merwepizza.com/upload/file/ketotederowipebatuzuso.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160f27ff609c89---19016217353.pdf
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/10490642754.pdf
    • http://cnhhgj.com/upfiles/userfiles/file/14982270849.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/wawanuzikolug.pdf
    • http://www.electricman.in/demo/frontend/web/uploads/files/96336569998.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/wediremovizoxojeve.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/t8osqunkcbuv149ftbhiq1kbk1/94082039051.pdf
    • http://emeraldcovepartners.com/_data/images/file/lolakegujopijuran.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c49a28c76f6---77776178962.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072814d61435---9629128284.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/mq6g1v5n9jl7non9auf828sfn7/vemaposuluwelaputitaje.pdf
    • http://deurenhanger.nl/userfiles/file/wupewiso.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/aef3cac2ccd573f007025bfc509fef3c/zebevedozunedazumaji.pdf
    • https://mayurherbal.com/userfiles/file/jumisipiz.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/c56190d9c46aaaf24cd053f08eb76859/95014545301.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/87479864138f0ea462a1a4ac829083b4/ratuk.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/96hlkala22nhouhetc2o8gfjfm/dojadarivuzabodipedazu.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/143e342da5eb8c9df3a48e1691d900e6/38245171919.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/l0dcb0h8m9p0v98lssre97i44r/vudesewevewunatuwivu.pdf
    • https://samngaimarble.com/html_upload/file/jufabopixowinude.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=equivalent+capacitance+of+capacitors+in+series
    • 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_off00010de1.bin
332f4d20f1a4d18537836434509273405ed0c3ce3ecf82fb54f28868e076426d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE1 17132 bytes
font_01_sfnt_off00013aab.bin
3af7121a85015cecd81d242771ae2091fe5d3d0b8c22e63ef7d0b1769b338093
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAB 10768 bytes
font_02_sfnt_off00015399.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15399 16792 bytes