Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7f4e30ff4ebc83…

MALICIOUS

PDF

86.6 KB Created: 2021-08-20 03:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d52621af6aabd387dd11d8a28d2fd82 SHA-1: 879ec54b6c94975b9e2c2edc77e39581b7aa1f88 SHA-256: dd7f4e30ff4ebc83b5ea1307b748a4a3dd16f1704edeb7b81281534b2c01c8e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to download files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the heuristic findings point to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ketchas.ru/uplcv?utm_term=download+naruto+shippuden+the+hokage+ppsspp+highly+compressed
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b06cd121dc7---reketawubo.pdf
    • https://agape4u.org/userfiles/file/mubulefolinafi.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160ac78fddda63---widanekarados.pdf
    • https://kham.vn/userfiles/file/83061666591.pdf
    • http://toflight.mobi/attachment/ckeditor/files/740da0d0e9a55b70b487c9c9032f8910.pdf
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/ritotezumovibe.pdf
    • https://dbjadow.pl/attachments/file/84761206713.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/ki3nofsksbg4h0vjfkhfqu96tb/gutosujiwugirilumo.pdf
    • https://cafemocion.com/userfiles/file/33201034292.pdf
    • http://driscollandgibson.com/images/edit_images/file/20655471498.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf8b65b0a9---pebebuzeta.pdf
    • http://www.dereformasenalicante.com/archivos/files/74921214982.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e82c0b46c5a---62065209997.pdf
    • http://www.allatpatikapecs.hu/images/file/65048556514.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/13a2788edd42a662529e57e80f0e7740/xejalokunefovej.pdf
    • https://cmoretv.com/userfiles/fujowagebadowu.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a08dadfc19fe78cee0758ac8230b6c54/benuzidu.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c341d8ebda3---53079689222.pdf
    • http://minhanh.com/files/fenupegurasepetibexifadit.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/51609803335.pdf
    • http://adabaskimerkezi.com/upload/file/68888030814.pdf
    • http://drprdesaihospital.com/uploads/89727230847.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4ef22de819881738109fb39ad0863a5f/82471473537.pdf
    • https://mtmhomeschool.com/mycms/uploadedimages/editorUploadedImages/file/vadeti.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_off0000e7d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 16792 bytes
font_01_sfnt_off0000ffe8.bin
8e8677b789e02212e500fdd4c3d18ae690ecdaef68ef6c9713b80380d0f2a85c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 11356 bytes
font_02_sfnt_off00011a51.bin
66ead9a05d1ddf609ad0189e2b68cb8dd67b1d19d6ae32da3806d8424e46c68b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 17916 bytes