Malicious PDF — malware analysis report

Static analysis result for SHA-256 2493dc8aac5e5ec4…

MALICIOUS

PDF

85.5 KB Created: 2021-07-13 04:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 674f91dadd85917a2dd7ad90fd32d02a SHA-1: 3e0c6887e6a2844ab38ee744db56101e678352c1 SHA-256: 2493dc8aac5e5ec41b49fba2cb8d65f56f1b4f0733698efc9b01631afd7f6360
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_REMOTE_SUPPORT_LURE' strongly suggests the document's purpose is to trick the user into installing remote support software, a common tactic for gaining unauthorized access. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, likely serve to host or redirect to malicious payloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/fed823a59ed24f9a47e39eee8f8df136/88293996677.pdf In PDF document text
    • https://healthmatters.me/userfiles/file/dexupamijubipevi.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3581919800---limenuwaxe.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/ec3c13c8759ace9bd87f9f88f61e7402.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/63385291467.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/xagovajufo.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/7e9ce55cb481c7357985861451678eeb/77417404765.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/u7g000lt15a838ta6efreq55hv/xusow.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c72bf78f376264c8f980aa5131005fda/sedasikomomazepudurejabos.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081adf43ce6c---womalelovejelepuxuvabepip.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/e07ea0fc968a3f86044e6cb7ab98f934/togolexoropolexa.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/bobugajepujazoripuvujo.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/34709563251.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160983ebb92200---37006448570.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0fcf5ba8014725dc34b251a03e6c2c84/50880951722.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/95417204071.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/94227681512.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/eurc0gke65mlhactuts19hrgu6/33806174068.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/dapafaganulaxiposase.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qi02ojmrnfj23dl8vgr9lr3ha0/fazisavatetal.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/sulodumetekemi.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/lugimewevuvoduresa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+install+xapk+androidPDF link annotation
    • 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_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 10524 bytes
SHA-256: b2629d6efe3d65b67c23c8bff231a45025a74c93109ac84d5f74107934eb1943
font_01_sfnt_off00010408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1A 17148 bytes
SHA-256: b7a1cb71d94f00028f8c0d83856717b033789881d3628584b3891d68ee1a13c4