Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0feda2d42fdbb1c…

MALICIOUS

PDF

80.0 KB Created: 2021-07-28 14:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4fabd974ce7afb58db965d8d6d22af6d SHA-1: da3da388a7e426165d0c8e5df54da72cfe71a542 SHA-256: f0feda2d42fdbb1c8a59b4338a4fbce1864ab3a34cf893db1fcf0eb3b54d4224
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, indicating it's a Pdf.Phishing.Trojan. Static analysis reveals it functions as a link farm, hosting numerous URLs on compromised WordPress sites. These links likely serve as a distribution mechanism for phishing or malware, potentially exploiting embedded JavaScript to redirect users. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4740

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 http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161010fef5a46f---molelido.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec5634d270---69549241110.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e303c88d90---37940661890.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/sodoxal.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/c0268l658kvq5gf0ubl9lhl1hl/13651339478.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b4d76710---44295103543.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/25486596267.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/62450670231.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091b6509ab71---12066613543.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe0b00eb9---63658230810.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/90819032881.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/65336935384.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/69503919376.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31bbdd5b2d---vubuxinorakajiwo.pdfIn PDF document text
    • http://epmachine.ru/d/files/34437842955.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/7ru4nmff12fkuopisk0r9podr1/12894568564.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ad270a4b---gojaxebolira.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/rebokobotigojadizerunu.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/pipufumadafepowes.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf8d91cf3a---fodumikudizejokuniwowap.pdfIn PDF document text
    • https://rm-parketi.si/uploads/60836572406.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/a1bdd64dfff599f799ed7121eb5cd469/zasaropedoxotokolokijili.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/70971403410.pdfIn PDF document text
    • http://peoplefoster.com/pliki/xazum.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/31e2ca5eae5e805954d0fbe810f55776/zugoporipisizivijupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=free+color+by+numbers+appsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 16452 bytes
SHA-256: bdc8f8e5f499a4ddbaece3dc1b7dc0e31904e4765247a72b0e7da1c54f5bb1c1
font_01_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1