Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9fbf3557dae262…

MALICIOUS

PDF

74.9 KB Created: 2021-09-02 09:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3df18faa7614c29d650a67ff029b29c0 SHA-1: 90aee2418a9a6de76446f591be7c83758d4c9f37 SHA-256: ee9fbf3557dae262ea2617f8f5b8f79b941023d7c87ad3aaa8c78a21c13b91fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to compromised websites, indicating a phishing or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or exploit kits. The file's structure as a link farm points towards an attempt to distribute malware or phish credentials through these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=another+word+for+actions PDF link annotation
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e560bf615c4---7118920674.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160765b15dd634---66451856079.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c0ead04fa3b84c2aac53bd34b282c89d/simenos.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/66558469629.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/tofadumabakezexupawaxa.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/lexaxefeve.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-8-21/20210821045041391720.pdfIn PDF document text
    • http://polkovnik.su/upload/file/35800304011.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/9i3k5v25jfol65cr50m41k5fli/jodikanojitewarigopex.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/zifufizosikobagili.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/91037efd648a2eabe4419e435da0c65d/pofadinirogusukite.pdfIn PDF document text
    • http://kme-kme.cz/files/file/10771701125.pdfIn PDF document text
    • http://chikatere.com/Upload/files/345762039.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba319959ab7---tipejulo.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/70671758374.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac2fe16d1---1573653661.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d30e8ab2a---86744136737.pdfIn PDF document text
    • https://avflash.nl/upload/files/77844969704.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6821668965e6271ebf7201dc77e32c08/wadidapixesiwefikunonu.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/2dcf6fcd9395537542ffe6267513a4d4/jenamonunurudatejeko.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608255425d2f1---43637237153.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077200eb23e2---dogide.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609074b18cca4---voliw.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/sikojosibap.pdfIn PDF document text
    • http://zkpower.net/upload/files/26646897017.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000c323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC323 10596 bytes
SHA-256: 84b73c96f2537dbef3b98b17634b4b7b43df34e6a89c4e59a56008e7e079f099
font_01_sfnt_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 16224 bytes
SHA-256: b99185851aa9e2c67608f0ad171bb6b5fbb77eee9f3da00136648a88ea365c4a

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