Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0054fedbd53b99c…

MALICIOUS

PDF

78.3 KB Created: 2021-08-22 03:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e9cb365ce9a5849585ff86c5cbbd8f3f SHA-1: 047e7bd13e336d1f5f461ed21b5f45f0010cb06d SHA-256: e0054fedbd53b99c67ddae63635c2ebd0eeb1a37585cca6ae62610263b113549
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://galerie-louise.be/userfiles/files/16036526704.pdf In PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d1ddc0fe37a2c9a318d768362a72069f/jerebokofekup.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085e07ca0b96---xisusatonatavoga.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/46350066487.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b846ea9172e---9969896923.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/boxiwexabonirowupuv.pdfIn PDF document text
    • http://www.eventoptik.de/upload/files/43276274957.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/49714941051.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/25434cac63e3a5519f8714a2276a2c3a/73038010530.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/pu522oapkjdj0uau63p07iqjjl/45364588272.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac02aed351---28362339314.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/aaef852a50d59b738ba6b29656433413/gelodixozetedesazezazusek.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/12529301419.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/30552845026.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f77f00b35---fuwagadarobafapone.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/gewuku.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8a11f030---didevifapesowevowanezud.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/13934936203.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/dewozumagemonilod.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/73487593032.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/93190016554.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/61825146796.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c5125ed7c---51368053949.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/xuvijevejurujor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=aye+jaate+hue+lamho+mp3+song+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_off0000cc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5A 16920 bytes
SHA-256: 1633984e667a9d4d891a629be986e9bcb928b5a9298c744504540d01d0a0d926
font_01_sfnt_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 11232 bytes
SHA-256: 8da8c7fe9fbdfb90aa4a4d53ccdb15af2fd0fb97426b690195774ed4f1d00324
font_02_sfnt_off00011290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11290 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1