Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcbce424233661d…

MALICIOUS

PDF

87.0 KB Created: 2021-08-18 13:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 08009d25485be6e716859540829f6ac7 SHA-1: c8f5653a75f705a86d30fa312ae449f4bfc2d744 SHA-256: dfcbce424233661d8e095872e085ea9bfad3980207a3c4a94ea37bdf42928acf
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of `utm_term` parameters in some URLs further supports a phishing or malware distribution campaign.

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://pixomot.ru/uplcv?utm_term=shubh+mangal+saavdhan+watch+online+dailymotion+part+1 PDF link annotation
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb56bbe1f19---xazoroto.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7c5f59617---65363906847.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117e84d6a57b---ruvirawoxu.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/33542104047.pdfIn PDF document text
    • https://sinarwaja.com/account/files/durepomowamebedumufaxap.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/058d7fa21c53ffef16ef92553b193863/63596565837.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/sadanux.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/tadar.pdfIn PDF document text
    • https://cape-electronics.com/media/file/jalapigovupasefuwewog.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dcd07a25b---gisefumogapawipuxore.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/69138jn08e1tqq612539qf39mi/bikebofijumodurubanonopi.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/61242845045.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/lojexadapamatugaxofopodut.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/81032334929.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/13253438299.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210722093115.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/xemukadoxalubilokoxap.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/7b99ffd844d509289615bdc947f29e78/zufosagegu.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6f0e695df---ruwibilamemot.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/25398804915.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/65277559435.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210805060346.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/cc32f79574933b44887897801bc2c7f6/vepixilibudolig.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3d6d4a96e24ea9ceee838f947790c49f/gitidasejikiruk.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_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 11596 bytes
SHA-256: 89fc3f398126071bede26061af077d6d245f7b29489a2fb53a5c5f8367d1e46f
font_02_sfnt_off00011e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E90 17632 bytes
SHA-256: 54a29a7a6b1115768d0449e4b84476e03b539d0a433d76b8eb3cea9ef6ac8cda

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