Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca4ae4e5a7e341e…

MALICIOUS

PDF

72.4 KB Created: 2021-10-03 17:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5f961a8df39a49cd2183041a12cabc4 SHA-1: d7af0a4d82347cc94cc8cea52e2b3a36fb35d840 SHA-256: eca4ae4e5a7e341e8aeee7f0fda34c54c2e7f5e87452b9067aabb73c91464b36
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://philabc.ru/uplcv?utm_term=grease+word+search+pro
    • https://fentesmakina.com/paket/upload/files/mopekil.pdf
    • http://pierrevillers.fr/mairie_files/file/5952373170.pdf
    • http://hattingtoemrerogsnedker.dk/userfiles/file/bowasojesuwadarawaxavobat.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/vokedajisulatopome.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/90893797194.pdf
    • http://alexlunacoach.com/img/editor/file/63284506533.pdf
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/jaxubafezijub.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/161541225e15af---digamefo.pdf
    • https://groupburuemas1.com/contents/files/41476838663.pdf
    • https://virtrade.gr/userfiles_lybo/file/18860595272.pdf
    • http://thai-apsproducts.com/file_media/file_image/file/42263345825.pdf
    • https://faresaldabbous.com/uploads/file/36154805459.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/51538310310.pdf
    • http://www.gesas.it/media/mailinglist/file/jonotawuxiso.pdf
    • http://falconfam.com/ckfinder/userfiles/files/26631855999.pdf
    • http://csc0311.com/userfiles/file/20210929061809_5a8jyi.pdf
    • http://muntepa.com/userfiles/files/xaganiwi.pdf
    • https://vanchuyen.pvl-soft.com/site/files/tadomotedetubum.pdf
    • http://myjobcareer.net/userfiles/file/2021092412450173499.pdf
    • http://aesg2edcv.handylover.com/upload/files/milodivivireper.pdf
    • http://lesbambousbleus.fr/ckeditor/upload/files/jajutotakuretemisidovaz.pdf
    • https://protraderin.com/userfiles/file/duromapexikutigunofi.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a505977ba---wetujebuvowinagakul.pdf
    • http://benthanhsgfarm.net/images/uploads/files/sigofile.pdf
    • http://highspiritsmusic.com/ckfinder/userfiles/files/91059533456.pdf
    • https://chiataiec.com/userfiles/Proj_Name/files/43830654902.pdf
    • http://newabel.com/ckfinder/userfiles/files/47833041837.pdf
    • https://guadix.co/ckfinder/userfiles/files/89420125180.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_off0000b7a9.bin
6a8d248fece38c8125336e3e50d15a1fe05edda40d33ded5850ab84258701a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A9 16880 bytes
font_01_sfnt_off0000e238.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 16792 bytes
font_02_sfnt_off0000fa4f.bin
e395819f03aec06e685bb10d0dfd9f3768528cc2344a93c4707d1eb4965d77a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4F 10396 bytes

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