Malicious PDF — malware analysis report

Static analysis result for SHA-256 769f5c3a83d40467…

MALICIOUS

PDF

78.2 KB Created: 2021-08-31 03:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9f31d2dab20e3d430e3647c33f8754e3 SHA-1: 976215e2277334aa2bd7e3c6276c9b8c5cb92a34 SHA-256: 769f5c3a83d404672ac9c387af989c439b61a813ae5bdb4c4710bf2c4883df29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially hosting further malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://aviatroglo.fr/IMG/file/71254354941.pdf In PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/54846374644.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/729ad04098abd231189059f18203781c/jotujojof.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/494c80cbabbe4ed18fdb22a8e2fa30a2/6863081196.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/fewupotitinonivuwow.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf606e0e3---kebug.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/7b913dc990928fab1bc8be275f95aed7/77507845472.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/lavovejadaze.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14dcab3574---79949607928.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080863c54e03---wogujufulu.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/56822994301.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/37164489442.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/gixadovoniriwux.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608db6ab6f28e---vuxafateripinipitar.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/25624070064.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609e33afa0882---36208374465.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/13734248676.pdfIn PDF document text
    • http://envigest.cz/upload/file/2559210290.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610e4680191ba---13134510448.pdfIn PDF document text
    • http://apcmagon.com/userfiles/xozewijowibikufemanivopo.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/17532326627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=object+oriented+software+development+using+java+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 17476 bytes
SHA-256: 9861bd58e5651fdfc2956ece94231900c7d5f5e15858527dabad4131219d86ad
font_02_sfnt_off00010fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD0 11508 bytes
SHA-256: 7d95e27e37cb20ee839ccddded7277dba74ef8d89b5c847020d615e1c37d519e

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