Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba05cec970f4759d…

MALICIOUS

PDF

70.5 KB Created: 2021-09-20 23:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf5ac33e972da0e01f882090ceaf80f0 SHA-1: 37a64c6423232f7e2e17d751b6a746a6b9823eb9 SHA-256: ba05cec970f4759d5d8a40d301c0ac786d1f72f1b23347705cf48a2a468a74ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to lure users to external malicious sites.

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 https://pixomot.ru/uplcv?utm_term=cheap+android+phone+in+nepal
    • http://codienlanhtrangia.com/Images_upload/files/77806396585.pdf
    • http://exhibitionchannel.com/upload/fenanem.pdf
    • https://chungangroup.com/uploads/files/202109161802384336.pdf
    • http://z-i-f.ru/userfiles/file/lukijorikufufuse.pdf
    • http://massintech.ru/img/outer/files/52561469699.pdf
    • https://receptabc.hu/images_banner/files/bokikatelufa.pdf
    • http://imosa.asia/uploads/files/202109140506393154.pdf
    • https://htijsr.com/userfiles/file/potiz.pdf
    • http://dichvutot99.com/webroot/img/files/40177012153.pdf
    • http://dok-vo.ru/userfiles/file/gijibu.pdf
    • https://hoya.hr/UserFiles/file/43222851679.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144900c600f9---37061114759.pdf
    • http://teraval.cz/res/file/33334837813.pdf
    • http://air-separation-supplier.com/d/files/kijat.pdf
    • https://ta-taiwan.com/app/webroot/userfiles/files/25519845462.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/f7s0a3e79fkcvft9o39pfg3h4l/25927288606.pdf
    • https://micsys.in/userfiles/file/wibodajajodaloxofonemuna.pdf
    • http://mebelhotel.ru/images/news/file/nelokoxalenaxofadem.pdf
    • https://enilubricant.hoakhanh.vn/uploads/image/files/nidudipeponiriponulise.pdf
    • https://robustbrakes.com/administrator/imagetemp/file/27879073668.pdf
    • https://snoman.mb.ca/ckfinder/userfiles/files/659732075.pdf
    • http://gatewayhotelbangkok.com/upfile_hotel/files/nomogusedidi.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_off0000b428.bin
8571f7f1d154750bc67a49847b1212e6fbbf79594cb9d55584a59c901bb7c26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB428 16324 bytes
font_01_sfnt_off0000ddd9.bin
f2fe3d7358ea4e3eb22a81d31fd6c8e0941b1cc1dc17a01ece90a9ec69673f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD9 10252 bytes
font_02_sfnt_off0000f4ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 16792 bytes

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