Malicious PDF — malware analysis report

Static analysis result for SHA-256 140fd05c0d784b07…

MALICIOUS

PDF

87.6 KB Created: 2021-07-31 03:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 449401212bb3e6b8fd4b979afd2de738 SHA-1: 293e4547f45b2c1d86ca4629495ff1a2b4d05a00 SHA-256: 140fd05c0d784b075319dfe979f8cbab0f8af69626fe02bcf5188312f26d0d4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress sites, indicating it's designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/uplcv?utm_term=download+aplikasi+carx+drift+racing+lite+mod+apk PDF link annotation
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/8d359ac878b30e067272b8c52c52a7cb/66024460833.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076edf23e48f---sukijopivijaxogowexijax.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/jabomaxe.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b41cbf99093---75997218916.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/49430541649.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/gesosokas.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/mupukeli.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/girovetulibufudobojug.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd1bd0a8a---jojevinovazodugusonav.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/temerisewidaxez.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/94803905d2955099a06f1c0b7494241d/73706269564.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0b568e6f0---32011547360.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086e0d5c1941---nazejilawikijizuxaxukun.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/trcnkerb8vj4tt91oulc871s82/ziratovuriditumatujato.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/guvebuluvuwi.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/36540998657.pdfIn PDF document text
    • http://goldenpoolandsauna.com/user_img/files/12909010089.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/9cc6204300c0a8da9aa79a39ffec780c/kegememilo.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/wogazovopuviraru.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0294654bd9---deligololona.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/nixivujozeruxijej.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/6244430156.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4f18a25c---13708592793.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58a708bd54---81808917855.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_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 17032 bytes
SHA-256: 2513dc0fc4d6fcdb8bb1a1a2f6ab18116136ac5fc43a12e8d85730bcb4a598ff
font_02_sfnt_off00013580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13580 11244 bytes
SHA-256: e16a78f0f13dcad94792a1837d52576628bc198f95e65eb4a2106a706f8a52ba

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