Malicious PDF — malware analysis report

Static analysis result for SHA-256 868eb716de56548f…

MALICIOUS

PDF

83.8 KB Created: 2021-06-25 15:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b8c7bc5a43ba9482774c51a97bdd45e SHA-1: b6ab0bb29a3425545faab5fae206613048117145 SHA-256: 868eb716de56548ff78b0ffaf2b3d7c199010fde81418b279793bacc766763e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The presence of link farms and compromised CMS uploads suggests an attempt to distribute malicious links or host malicious files.

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://a2designbg.com/userfiles/file/53247026102.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a20f5a5c9---bukoja.pdf
    • https://vieclamxaydung24h.com/upload/files/49879036461.pdf
    • https://slide-bearing.com/d/files/42770010962.pdf
    • http://uptownherndon.com/uploads/files/gawas.pdf
    • http://alliance-ltd.com/userfiles/lijenumix.pdf
    • http://alumcity.ru/userfiles/file/mumemexufavej.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f5b35c5d90ba26c8747df24fe38944e0/20034148655.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05b7a7337e---27681939810.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/6eb8a0943c23a40750aabb31e6933a8f/xeravafaketivejim.pdf
    • http://agnieszkapawlik.com/userfiles/file/bilixewezovop.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606f53ee3281f---wodosinelubatexu.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a6de05c16---96368228178.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a56d6e58e73---sezas.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/75188125628.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/500f1907c4b9f0b7eacd40df54e0a975/28782855816.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce841bd093b---mizuribase.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=growing+up+multilingual
    • 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_off0000e338.bin
5a245ed7d1bc0a4bbdc2b31a8ee4d48d1e5c95651761522eb96a59c7d96c8878		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 18144 bytes
font_01_sfnt_off00011272.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11272 16792 bytes
font_02_sfnt_off00012a89.bin
39ae7e4f4acc081d2c3504f6b904974a1148ba37e74a9f0ea8193d9b62b6c66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 10520 bytes

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