Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bec1139f83bf27f…

MALICIOUS

PDF

88.2 KB Created: 2021-09-07 23:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 649f36a9ef974f7ad6374bf338f04fb3 SHA-1: 475a6e728f34e05789e6caaf1f998da9765283d6 SHA-256: 3bec1139f83bf27f7c0ba85fb25aac2717d4fceb83b67067717589f6eb71a108
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS upload storage locations. The presence of these links suggests the document is part of a phishing or malware distribution campaign, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=qrp+to+pdf+converter+free+download
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4094298d41---86384780174.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73358e1953---baxibifevajisefeximixo.pdf
    • http://chinhsuasolieu.com/media/files/34516602929.pdf
    • http://detikakdeti.ru/img/file/63083691079.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/rqhubgnnaeoto7mqc79i2qm54v/87261376750.pdf
    • http://ankurgroups.com/userfiles/file/tonizosiwimadewemu.pdf
    • http://zaun-produzent.de/userfiles/file/27906675673.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ace8363366bb851bd7c14381ad1d86ba/47896982808.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16110f65bea7fd---62609943071.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/4c66cbe8460183748ab8601dde946c12/kiwejo.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/9a3u8v8pv17s25fqh50kcp9r3o/43464970348.pdf
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/rozixiwezaje.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608935f4e837c---65626826988.pdf
    • https://alsharqcc.com/userfiles/files/33048265155.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/da4170ecae1c3bfe9266118271ad04dc/dibawe.pdf
    • https://patoman.ro/ckfinder/userfiles/files/69098238856.pdf
    • https://muratay.nl/userfiles/file/sabemezi.pdf
    • https://infoenergie-loire.org/userfiles/file/kemog.pdf
    • http://veewood.com/file_media/file_image/file/pogefol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ce.bin
3953c496990d208a5ec808b0b9455a4c6a99f83a24afed54eeedad6748bfda30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 18472 bytes
font_01_sfnt_off00012360.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12360 16792 bytes
font_02_sfnt_off00013b77.bin
0d03d768163eed2858256a96dc7ed0c16d89d152feb3bf1634b97cd61dcb3d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B77 10564 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.