Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0429fdf6ccd7d1a…

MALICIOUS

PDF

93.0 KB Created: 2021-08-08 17:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ee19d8af66e7288320ab305fe0bb39b0 SHA-1: 92d7fd203a90af742bd84dcae1aca52d54558588 SHA-256: b0429fdf6ccd7d1a3980b57467e388f84539322d6007afe12e01b1e8534ebf01
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to compromised WordPress sites, likely to download further malicious content. The presence of multiple external URIs and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a social engineering tactic to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://oniceh.ru/uplcv?utm_term=mission+impossible+ghost+protocol+hindi+dubbed+download+300mb PDF link annotation
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b62c65a4f---94373199350.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f7a2930a7a8ec7e0bf39734d64002856/99375149453.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/peserukapuwilak.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/177e6266d2e80c34ba08e0da4b32df19/67443938023.pdfIn PDF document text
    • https://akvaguru.hu/user/file/81879017181.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d28148202---52440694010.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/durefivozowixideperakaru.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/85dbcddff92680649b9c6f6adf268abf/rolemubitigujuruk.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/9cf6a14f626dc261efb3a2dc808e7c49/gobisepogosenuvuzi.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a1876c7012727d21d0f4df49ad7f424a/72900670590.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16231234941712.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/gemebomek.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/kolanipawekomazozogesuj.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/62666490766.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/rajako.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/natopu.pdfIn PDF document text
    • http://szwygs.com/upload/pidotagelopib.pdfIn PDF document text
    • http://health-bridge.in/upload/file/18854122171.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/2eb1d7da9ab64118591b93e652addae1/lupif.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tanejavuxab.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/f048e14cb509252edb7d7008141021d1/dodofitilixe.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160e773388eed7---budaxasukemazuter.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21193d3152---gezede.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/tapisadavasuledobeti.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/lenapebelazutejanulepudar.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/46329401072.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 11572 bytes
SHA-256: 0cfc61be35704ae90496a241f8d26d267574dc3702eb95ebdb2cd54fdb2ee26f
font_02_sfnt_off0001207b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 16232 bytes
SHA-256: 332bcfbe1d60e71d379c8cbbf929c3b267dbca5800f78657f6d5b2b22e3587ba
font_03_sfnt_off00013665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13665 17904 bytes
SHA-256: 9c266c30165a97fb6860c2fed6881c37e7204e05ecc25d6d4c96482a6857279a