Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3d50de9924178f…

MALICIOUS

PDF

84.0 KB Created: 2021-08-23 16:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3280ac89c710a1f91bac00332756b12e SHA-1: 28ed745fff6a09e87ffc5420d838cb4f0680a625 SHA-256: 0d3d50de9924178fb0c019c4c48d1f2cf03bf852d4bd0c93030b6dda200c2e48
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious workflow designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=the+farm+tamil+dubbed+movie+download PDF link annotation
    • http://files.ibiza-ferien.de/file/difudenobisevibaxufunuka.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc45aaef49---pugepew.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16103d0aeba7ad---27545128550.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/55319431868.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/e5a94e482a1cc8111939618cc7cbb65e/vivufulikusexo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160bb21e43b9a6---88095703470.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd255aeb98.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a6dc987c0---puludadifuxasuxun.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/bf06cf578e83f41445b57d6ca7ade145/1436145810.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/jrhfjlfcgab6anc7kkuf6l11be/xedutalixixitagufud.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610c099d28537---todepenixipulonoxejanoxa.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/05f9776746259e978ff23dd130f86df9/74264181329.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/lipiwodopojedu.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/dirigukuxukekonifoz.pdfIn PDF document text
    • http://zgic.ru/!upload/files/fubixuta.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/21841484156.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baa56ebba5---bikaf.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/54653235512.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/13269567307.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160928d1f549b7---ruzojisafili.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a8df82f381dbf9f4cf55b6090daeabd3/42577099384.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hkthopntp3qaki060tgsemsmln/lutusase.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/tenosidumer.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a32b48cc92---56335932620.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_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 10804 bytes
SHA-256: 2410e36df03a99dd2195d9cc4bd71aaa75e6361c3755cf83df0bfc0f483cd7b2
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 16884 bytes
SHA-256: 39e4d602fd9e4be92e7fbbf6d97694b7abb755711306586f44159cf4a40e1ab8
font_02_sfnt_off00012a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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