Malicious PDF — malware analysis report

Static analysis result for SHA-256 e805b813a736f93b…

MALICIOUS

PDF

93.4 KB Created: 2021-07-02 14:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 21e4eec3d9b45837b0baa342a18db29c SHA-1: b9f8f867310cc16a5f3e6fec58e9243d5dff2b22 SHA-256: e805b813a736f93b5d796aa5d0ca5ba0fcaf6b4ce317bb7c17864c69fa1850eb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which appear to be compromised WordPress installations hosting PDF files. The presence of a raw IP address in one of the URIs and the ML classifier's high confidence score indicate malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment, suggesting the document is designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://doellefjelde-mussemarked.dk/images/newsmail/file/19990616894.pdf In PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6804eb41b9---38612119133.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e95357b92---18181553239.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/97840180391.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a3e333365---54990068577.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/5c7e22595b1a14feb8e9b276c031cf7b/75577754911.pdfIn PDF document text
    • https://cape-electronics.com/media/file/lafosediletap.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/c5684c34dc5295f17a534a561009944e/wivefadikitogiz.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/5djgj7jaubnp9t6s34js81erg3/sipekubufuxarixunudexa.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160864d869dcf3---76416239298.pdfIn PDF document text
    • http://premium-h.info/files/files/doremifijexopejojapuf.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/18659164095.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608aebe4f0f99---tarisebisix.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082d8e9b93d8---3395168772.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ff7722095---lepisakotod.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/27077612983.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb079edf84---bubividu.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/9n5t87agpov1svk8496rcsrp3f/9090046866.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/4e05a170d979a230d4aeddb3250fb0a7/7143489863.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b4029e09---84664800492.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e5e899d54c6cba8ce4dcb840b0eece56/45329120049.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16070c220c6b73---99702733795.pdfPDF link annotation
    • https://mfdesign.hu/files/file/28505954550.pdfIn PDF document text
    • http://cwesp.biz/upload/file/19448460013.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8697e08baa---zigasumefatijavex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=strike+force+kitty+2+downloadPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 10788 bytes
SHA-256: 54d668ea3543641a0a17b84f6c77e7b191d40ea23ee0f808834cc08a62f48dce
font_01_sfnt_off0000fa7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7F 17132 bytes
SHA-256: 7b4f0ddc7ad96fd0ed078941e3e4a917d03c78a0b41d4ecc118f4afd3cd24b90
font_02_sfnt_off000113a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB5 28104 bytes
SHA-256: 178db29a935f87357eec51c16f8074b73e2bff9743c88b11ffb20e982a2aaf60

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