Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d007ce541451bdc…

MALICIOUS

PDF

76.9 KB Created: 2021-06-29 05:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2046156d93bc86f62f431c517dd70f70 SHA-1: 833f6f7240111402a50b312105f28d8e1a5634b2 SHA-256: 0d007ce541451bdca0b82f12eba9372a0e2c25e0038175a13f5d9fafdbe76746
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. This suggests the document's primary purpose is to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6d8632be---52387255646.pdf
    • http://donghozibistore.com/luutru/files/zarabojugetapuri.pdf
    • https://emmaushuis.org/pages/49314156572.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d045475135---37716093589.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/i2v4hgujjmvu4cm3tgi2c81tc8/65174101745.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160766f56b2597---25339556473.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2lp67mjv1k36kgi21o1315qk90/61409105510.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/06aade399c0d116d1db3b3fda72452b7/deter.pdf
    • http://learningkey.org/userfiles/fuxevajeditejiwe.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/c1b60d86287ff7e0d812bfa5c96b6952/8731753049.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3f9d7bd03---8329850377.pdf
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/62760709382.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2d9f1136d---zekodimipadinebinolijixom.pdf
    • http://eltonltd.ru/sites/default/files/uploads/bumagipusisufolekovejev.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/cf69aea497765d6cf7fede3c413ea127/64405480659.pdf
    • http://benrassam.com/uploads/files/1343401290.pdf
    • http://foto-klub.dk/userfiles/file/kozoxemekawopujobanetu.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f34d91afd5---16304511997.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa10d518fb---26687770172.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc956e515e---31640919582.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/hdcjcvk0qk3qiaa7d4ttnm6fm6/82155270581.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160a58f90a92bb---42400521626.pdf
    • http://architettorobertafasola.eu/userfiles/files/17607032125.pdf
    • https://deepankarbasu.com/FCKeditor/file/90465059786.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=hooligans+sports+bar+and+grill
    • 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_off0000c9b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 16792 bytes
font_01_sfnt_off0000e1cb.bin
563d9fc0c6b88fa3a67564e78784545c0f000937f6bdbb9105741993deeba872
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 17192 bytes
font_02_sfnt_off00010e9e.bin
2f2ac94184977e4f2885aebe73975494b0b0893fd2cd3ba9008ce5f6aa90d244
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9E 10564 bytes