Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcec2ca38f830f2…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 20:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c38794f8ff9ae9165e5d1e3693550eb7 SHA-1: 98f12896af2dfe637364ca4cefb088fe3d53dbb6 SHA-256: 0bcec2ca38f830f26283d84e6b80eb70a67a2a93858e08519c4001208e83009b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://rhuyscampingcar.fr/images/files/34215167169.pdf In PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/28073276945.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/duxipodabagepejedezamibi.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/7942096496.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/vuxuzakowalibomorawino.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210910005158.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/3151199560.pdfIn PDF document text
    • http://polletnv.be/uploads/files/60801319469.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/zamuwubilibukosesozidomiz.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/93688943034.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/jitonizukotutukojaxe.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/lilozisatij.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/1455246852.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/13322084036.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/wezotipusonubaf.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/75711564288.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/63630885828.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16141f72239e6a---32693665086.pdfIn PDF document text
    • http://receptlap.hu/files/suvuvuzatogogarukulimuz.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/mukimer.pdfIn PDF document text
    • http://gibisch.com/files/files/2005366919.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319d3a91925---jegakevaxasijuwufemagol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=dc+battle+arena+mod+apkPDF 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_off0000d63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63A 10648 bytes
SHA-256: 74c61acd57dfdc718527ff840448db00cec28579465b73370a8dd08960b03caa
font_01_sfnt_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 19836 bytes
SHA-256: 0548790c0cd9903e4744d038419b21138d7fc58ff797ab308fff136dd867b810
font_02_sfnt_off00012251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12251 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1