Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d090cb6ce1fd474…

MALICIOUS

PDF

82.7 KB Created: 2021-09-18 18:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4561e942635010387b1a25630112dada SHA-1: 08f5237bd5048b0b1773c2056fcf432f1774e2ba SHA-256: 2d090cb6ce1fd4740e3434057571dc18608bf4cbb09047698e8807ba1f6cdc28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crysiq.ru/uplcv?utm_term=ptv+live+cricket+streaming PDF link annotation
    • http://demo755.webbazaar.com/uploads/gufadike.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fd48ba6bf---15698754332.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/12790911024.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/xenibubejijasenakunuki.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/lekukiwi.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/86893626806.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/mezurixi.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/dikimogazorasaj.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/fikabinojogalivuko.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/denadux.pdfIn PDF document text
    • http://quetthe.com/upload/files/96127379792.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613164d158de6---kutafosesab.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/32678953485.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/53765580958.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31af987be---gofumunuwedov.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/zazinox.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/pugoninoduguziwive.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/vubevaseluradusujo.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/89986081643.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/ralotilemuzikinazumapivis.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210909/210909135308237157xbxg3i2h259j.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/zotix.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/42582420221.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_off0000dfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDF 10612 bytes
SHA-256: 6aa41bdfed288a3739ca5eea801d4ad882e3a5887d5e20048dbfcf11352ca31a
font_01_sfnt_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 17360 bytes
SHA-256: b1ae0f8ee1b6298d0bd3d0bd9566e2a1ad99aad11e45866386eb4d7d18a019f1
font_02_sfnt_off00012515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12515 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1