Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6934eb9398c6d2e…

MALICIOUS

PDF

92.6 KB Created: 2021-09-10 00:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f14a3436fe145a73894e3113935224ed SHA-1: d6a9f2be6b3e9082ee7b8dd9a654f3a7dfcf3024 SHA-256: e6934eb9398c6d2ee5bd385a2cc2c963fa2a230a10b35bc95c25a0b99b5bf399
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly support a malicious classification. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://oniceh.ru/uplcv?utm_term=how+to+get+robux+in+2021
    • http://wsm.hk/images/files/mopulotid.pdf
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/rakagidatubotexoditodu.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/1fe2fdd224d52bbac94cf6df9d80787c/sizajufopimepek.pdf
    • http://kimdaiphatsteel.com/Images_upload/files/wugozo.pdf
    • http://nakloboucku.cz/uploaded/file/13464618115.pdf
    • http://nhasachnguyenvancu.com/Images_upload/files/xosaseboxe.pdf
    • http://getem.pl/files/file/kulilitemememidokuk.pdf
    • http://bobiniauto.com/userfiles/file/xaripavo.pdf
    • https://deltarents.com/upload/ckfinder/files/21211179674.pdf
    • https://beeshark.ro/app/webroot/files/userfiles/files/vajarabubip.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339c5b458ee---41976862579.pdf
    • http://lechioutdoor.com/userfiles/file/14452134285.pdf
    • http://ylgems.com/file_media/file_image/file/95464510160.pdf
    • http://mutitar.com/user_img/files/vejibadivoz.pdf
    • https://kolkataangikar.org/ckfinder/userfiles/files/zumusegatiselafebijoru.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/62731899441.pdf
    • http://www.ciesol.es/ckfinder/userfiles/files/10158701198.pdf
    • http://siamintertrade.com/file_media/file_image/file/63188444541.pdf
    • https://senesi-sklad.cz/userfiles/file/jirozuxejufazitejo.pdf
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lekudovuganibolama.pdf
    • http://brilliantsolarpaneling.com/userfiles/file/71320360445.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/rasomak.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_off00010273.bin
d39767279c100245c12baa41f4d9dcb4119ad71ad5ac58240296d6795e63aa44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 10620 bytes
font_01_sfnt_off00011af0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF0 16792 bytes
font_02_sfnt_off00013302.bin
d3e5095468cec81538b9d1ab31d99a29318db8b545f3270fff4922e0fbb5b34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13302 19112 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.