Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0e7349e790788b…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 21:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bab0fee87dee357f0c3f438b6dc6e689 SHA-1: 77b29be13f93674a2a909ede6ea6c84594f419c0 SHA-256: 9b0e7349e790788bbada7d17eabcf91caacceb8b2adc7d48210e29743b132ff7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://imotrading.com/images/userfiles/50896946796.pdf In PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/lojudasizu.pdfIn PDF document text
    • http://poliinc.com/upload/files/kiditufazilefafu.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139507fe5b50---fojopovap.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/gozenudo.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfa61d32e5---limujelemus.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/40047584095.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/bezivojulajixigu.pdfIn PDF document text
    • https://lp-tracking.com/userfiles/file/fogaboxoremepanipogure.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/bpg516ev21a1jjpmeuc7orb7bi/75117750647.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/73450864788.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/zapinetotomifakaleb.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/91462674341.pdfIn PDF document text
    • https://faceless.me/userfiles/files/lopilikorubaziz.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/lefofezola.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/89021046387.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/dasokotapepagitusu.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/dupiziwa.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puxej.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/91807088347.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/vevomuwabevir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=textbook+of+anatomy+and+physiology+for+nurses+and+allied+health+sciences+pdfPDF 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_off0000af0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0C 11580 bytes
SHA-256: c3288ca8a65ef32950687b90f45606f6ebb76284e8ebe337debd4b878dbf235c
font_01_sfnt_off0000c9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FE 14616 bytes
SHA-256: ebf4c361fb0c8af8791e07f04fc36e6664fe052f6566becd9247779e540666af
font_02_sfnt_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1