Malicious PDF — malware analysis report

Static analysis result for SHA-256 264e62ab5a3351e0…

MALICIOUS

PDF

97.5 KB Created: 2021-07-21 16:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dd1d14c1f6179c0c86f096d9d5b45b0 SHA-1: 44192fcbca7a9d2d2ae34a6c757ea7b19b35dd86 SHA-256: 264e62ab5a3351e0c64126edfe57c52e8d275c75b6baba00bba54a176603484e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm and a lure for fake invoices or payment requests. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://photou.cc//ckfinder/userfiles/files/sisonetike.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/b70e4f5ed1cd672a14ace02347277446/jolubujewufagetaved.pdf
    • http://ingmontagna.com/userfiles/files/80776605101.pdf
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/52155041189.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/703bd2637f5e624f096f73c152465ca5/8322367476.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d9cd1db3a---32530752345.pdf
    • http://okfilm.kr/userData/board/file/33015265894.pdf
    • http://myjobcareer.net/userfiles/file/2021062219434773499.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/4cakh3tuik06fh1333aebvcoj3/7052511188.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9acfec5a513a3086f4c31ef5da5c8ef1/koxezoriz.pdf
    • http://thepducphat.com/upload/files/midupomejamolubamupedax.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9664b9755d2f79239161eca436b44533/30798316489.pdf
    • http://www.aadhar-interior.com/userfiles/file/57252387223.pdf
    • http://dominoliberec.eu/images/file/files/lemejoduziwowa.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17686920727.pdf
    • http://files.ibiza-ferien.de/file/6054620611.pdf
    • http://joy05.com/_UploadFile/Images/file/fikifodivaxadakinisovonot.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/6crjb35tva92se087sfivbqikv/50200287763.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5c509d25d---zigowowexokezopule.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9592e6eced1dc0682d034d68a054cfc4/puvozerar.pdf
    • http://gurukripapublicschool.com/userfiles/file/tuwakovezalemejudox.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/17d6ib0qn6u9ucgqc75c2pnmfo/zutoj.pdf
    • http://omegapizza.net/uploads/files/45335544845.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/969106b083fb9fb56865f998c814e821/romojefigedimoniji.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=law+of+attraction+book+in+tamil+pdf
    • 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_off000119cf.bin
2c264f30580d51e91a3ebe626f54e579e144be9f2a90a2587499ef4e270c48f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 17440 bytes
font_01_sfnt_off00014786.bin
7a4b62385d8c2a1a5fba2a1678f081c4e35602959bcf05e042a80107af13e984
pdf-font-stream PDF embedded font (sfnt) at offset 0x14786 10756 bytes
font_02_sfnt_off00016012.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16012 16792 bytes