Malicious PDF — malware analysis report

Static analysis result for SHA-256 60edea8449b92730…

MALICIOUS

PDF

85.1 KB Created: 2021-09-11 11:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 891825f2007f044af4d115d6d51d1117 SHA-1: a8a9b68b5a1514400f4bd58bf35cecf9c6f91cec SHA-256: 60edea8449b92730331415aa99b7cf2b5459f5c71c331b39763c32eacb6f057f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and a link farm heuristic strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://floral-design-lindgens.de/userfiles/file/18746098451.pdf
    • http://www.ondebiz.com/userfiles/file/dimototugumezofi.pdf
    • http://ekorepetycje.eu/Upload/file/40734399337.pdf
    • http://anbao.vn/uploads/userfiles/file/gunomivaribonibudunuj.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8337e2767---81218501198.pdf
    • http://z-sinpro.com/upload/files/zikunonexib.pdf
    • https://campermagazine.tv/public/file/82465095628.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82f7aa1926b1216f818c7174ab85237d/69913544234.pdf
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/11188432192.pdf
    • http://sahrugs.com/userfiles/file/jabel.pdf
    • http://heorungminhphat.com/luutru/files/tagokinedamoxe.pdf
    • http://cascad-trans.ru/files/88777112120.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16138324c90c0a---medipiv.pdf
    • http://ajk-opakowania.eu/upload/fck/file/sujavud.pdf
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/fisoxodotitelezamerup.pdf
    • http://shepardinteriordesign.com/rw/upload/file/72542069282.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf66487d18---9445872939.pdf
    • http://prompol.com/media/file/sesamezow.pdf
    • https://nicklason.se/ckfinder/userfiles/files/6043504188.pdf
    • http://oikoscoccatoarchitettura.com/userfiles/files/rogubi.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e9e45894f---jujezuxom.pdf
    • http://star-transform-moscow.ru/uimg/files/junojub.pdf
    • http://thenext.pk/userfiles/files/poxile.pdf
    • http://captainkillmite.com/uploads/files/202109111358512280.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=moldiv+pro+apk
    • 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_off0000e39c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 16792 bytes
font_01_sfnt_off0000fbb3.bin
b80568b6446caadc247d6b6ce0b2d106f0a2800c8e8febecb714591e12bde50d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB3 10036 bytes
font_02_sfnt_off00011208.bin
59cbfc05e9dc38706d65e99e668300a63f10834a6f639260a6c41a52ca31f359
pdf-font-stream PDF embedded font (sfnt) at offset 0x11208 19980 bytes