Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c9d323e56a0c09…

MALICIOUS

PDF

69.4 KB Created: 2021-10-04 05:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96f26a052be8873f794de7429c80a8df SHA-1: c14a5878ca50d29735f47554c9493c48137d04e5 SHA-256: e4c9d323e56a0c0954ffc703c1565e2d2b14979870b6f6f4cafffb512e515364
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, one of which uses a search term related to downloading a popular game, suggesting a lure for malicious downloads. While no scripts were directly extracted, the PDF structure and numerous external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://clubesquilacoma.com/uploads/files/53103156071.pdf In PDF document text
    • https://idd.no/ckfinder/userfiles/files/sojakinimeselatorojax.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/87136968369.pdfIn PDF document text
    • http://saint-party.com/media/file/13677022762.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/41780297811.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/bavakanezine.pdfIn PDF document text
    • http://homeopathyhk.com/files/41545089095.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/lexezomoloxoxerag.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/35039991350.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/72004371579.pdfIn PDF document text
    • http://leton.pl/userfiles/file/rejepasuburaxebuzagel.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/tikixajajajejugoge.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/58572736844.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/vuzebamadiximumalunofaboz.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/93159130184.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/31891405151.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161348404bef76---77150825248.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/reloli.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/1048867275.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/20732520443.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sovowutubegoramajopuligeg.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/6130617499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+among+us+online+freePDF 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_off0000ae52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE52 10784 bytes
SHA-256: 6820e9db17dce300a308c53a158497a224b79dc9c0453ad4213f55fabe6d72c3
font_01_sfnt_off0000c6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 16296 bytes
SHA-256: 3112465ec51f070f2b1ed1fa0360bf3cca2e53f94345973c753302c01de6ab3c

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