Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4b324fb0ab9046…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 06:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bbf1a63f2802e6a2d1b965a40b4cf1d2 SHA-1: c614ddc3000169a5a789c77e4809e88ab1703a2b SHA-256: 0b4b324fb0ab9046d4f5826f7467b6ece72fe65999216d913d3d6df64ebb4877
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded URIs, many of which point to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://giritrademark.com/content_files/files/35150886220.pdf In PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/87291810621.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/rumibamuxepiziruxikipulud.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/vugipalobu.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/rupomi.pdfIn PDF document text
    • http://origo.ws/userfiles/file/tapedalekagefixiniju.pdfIn PDF document text
    • http://partnercable.com/files/gamuje.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/306303581.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/titizakuvu.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/16051500634.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sajebenebeweleminoz.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/6824946512.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/44617409499.pdfIn PDF document text
    • http://tabletopad.com/images/file/femanupepov.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/42290944135.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/tonujufuzojedexa.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/voside.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/loginelafir.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/mamegonaxovifar.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/niwenuwogoxebatazu.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/jorifokixitetenivad.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/87746328555.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/7549752aeea2a36c8c70f8331c88ee0c/jexofom.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a3aa3e0f0---86649694576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pokesniper+apk+downloadPDF 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_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 19160 bytes
SHA-256: de3cb7320bb4fb72da428b160dc8efa9cedb600c1c7cd3b724cfe3370f7968e6
font_01_sfnt_off00010a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A18 10464 bytes
SHA-256: 01dc0e4c02a0ab3d002412d413a84fd2b91d0299928e39f8edec4c0ad56964ec
font_02_sfnt_off00012207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1