Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f05e73585dbc37…

MALICIOUS

PDF

93.2 KB Created: 2021-07-18 11:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8963f38b4a27803b841ad46f5b113c46 SHA-1: 87c315d65cc60d6263e962468bd84daac808066c SHA-256: 58f05e73585dbc373949287b44d572b8f3e1cefc8d8921b1cca1fc4ca15e091e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3161

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 https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608af200b1c77---zezejumolavejisexubeje.pdf In PDF document text
    • http://talleresjpg.es/img/file/37881706444.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/gamefimefulanedugo.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210527213515.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1476e527fb---19309994323.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092c6ffc450f---18989691911.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/86f443ed8a6b7a4fa03f6dda0fd61c12/zelanipawapobileju.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/rixakirezaresesi.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609daeae1045a---genazanoxazisikuxitifo.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/5321640498.pdfIn PDF document text
    • https://aashianarealty.com/file/36694404234.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/oahu3v5ibo0313q4mv5rm5aabl/57006589028.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608100d6ce795---12744893305.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/xutoxojozowipikowubojimu.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/0718c48faa7114339abb4d1e03c58d0e/rugili.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/43386397861.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/75d0it01nck62qem00sn4imqof/duxametawikulefazazo.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/ninirazomifuzeku.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a6ed78f---famodevunuzexuxijexid.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6ed9345de432cfdf30429aad840cb8c8/55675611168.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/316040295.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1920d264f3---nudijowugevigefume.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/55181032139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=land+lease+template+wordPDF link annotation
    • http://irodori.kir.jp/files/file/totigojigel.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C1 10504 bytes
SHA-256: 78848dd29d430a47a3004023cb48ee79ffbd69dcd7b7580610e67d3573b6f460
font_02_sfnt_off000148a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A7 18200 bytes
SHA-256: 9c073fa11a88a94bfebe59189a39c5aedacb680cd1b34c58489449a26e525ee3