Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7037678864d9cc…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 08:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8392b0b1dc636221d03d1bcfd569507c SHA-1: ff0515bbfe6d974cbe3a23ee37b814023be8ad60 SHA-256: eb7037678864d9cc40bce348ca253ffa53d27fed62a1d6efa16750184f94f53a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for distributing malicious content or conducting phishing campaigns. The presence of these URLs and the high ML score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://jurabos.nl/include/editor/file/kuloribokedulurulile.pdf In PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kesut.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/zunexubumumewajapuzadumet.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/zunowaworuziniwisetinu.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/zajodoniridotixoza.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/86096437245.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/dikusupujamu.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614217e8e407e---97791843002.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/zimoxoxulukip.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/biruriluvawavo.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/rimireloxivenizupuka.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/nupuguxulelowopafobovolo.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/99921479927.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/kigaxarobogujojolanarok.pdfIn PDF document text
    • http://blueyee.com/upload/file/180554486069.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/razevifudivunepimabulexe.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/vuvakiruponutunekadax.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/wisopiwabev.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346d821404a---tilolevadexagek.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/172440432461383606d85a5.pdfIn PDF document text
    • http://myredm.ru/uploads/file/metilipede.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/71402073522.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/96471939689.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hvo6jl4knjfopekm9f04fj4f05/rixopod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=android+1+piano+tilesPDF 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_off0000cc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC83 20892 bytes
SHA-256: 55690ff12db5656abd85ed52fe9546f9deed24dd76c7f515cb86406a04648cd7
font_01_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 10416 bytes
SHA-256: 253d13cb7d483992ec8ade223c6e620ea2ef772e8f45f9d3b5433c13703bfdc2
font_02_sfnt_off00011a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1