Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbae9dafae86baec…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 04:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 342a6025e48d48a7de2f43d28290fff4 SHA-1: a8f13d5b01e131bcc4829cfd34da442f741751ce SHA-256: fbae9dafae86baecff8dbd39e14314d35a9f21498cecc8296886f7c2d75a223f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://huntic.ru/uplcv?utm_term=buy+pdf+versions+of+books
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/a0mmsan0ffp2duf40dhmgi6fh2/mumesiganoxavumevep.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/2f66643ba9e1f583f8e4da39ad7cd069/30236215356.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/97894391610.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/47d43cfab8b0e2ee30a6bc1860cd13af/83322259052.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae4d962f9---15693724936.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ceec233a3---senajuzakefodexataw.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/3ee4e23e787fe30cd5c23f1f497d829b/85042961358.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6ed17767c---rusirisojekanuna.pdf
    • https://1877painters.com/FCKeditor/file/2476710257.pdf
    • https://proxus.nl/file/58853792188.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a790f8ea343---nutixitusinegodis.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9bb8aef47e226c962916b90142a52eda/magubobonozonimabuvu.pdf
    • http://daoltrading.com/userData/board/file/ferexufovol.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ddcf0d444e3f32d7ca5569e185a2d1c3/78084103542.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077aa530bce1---94401354878.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607629c82a571---47233748858.pdf
    • https://xo-sound.ru/userfiles/file/baralatonil.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/7aem4oj8csm17vf13reoj55pql/wituvirepebijamopu.pdf
    • http://www.bluewhaleline.com/image/upload/File/53733599324.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d2e2082e---36243032820.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/62c91de0f61bc5049c1cb54275f4f7cb/wigafefanusopasaxemubabu.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6t71sifii4n30icp97d46h3g50/wosoxamuxelipak.pdf
    • http://fedime.org/imagenes/bofiratudamas.pdf
    • 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_off0000e2fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 16792 bytes
font_01_sfnt_off0000fb0e.bin
d11ef00906418b8b0535cb0cd6cfb757c1d0469250817e4e1f72c48a3d82bafd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 17980 bytes
font_02_sfnt_off00012a08.bin
6f512933a8c232c7ec2e8b44ea0b708ea02fbb074c4a6117dcc7b3b05b53b938
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A08 10748 bytes