Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa290de3d0a391ab…

MALICIOUS

PDF

81.8 KB Created: 2021-09-23 12:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e1a6405359351d3d88d6a64fb604beb SHA-1: d621af13d3e8c80cd7555f10b80da0b440c73db2 SHA-256: aa290de3d0a391abee64a2fdfdd79a86c6e3dacc1642b3cfb61e22ef4f8f70be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs that point to disposable domains, suggesting a link farm designed to redirect users to malicious content, potentially for malware distribution or phishing. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://medical-1669.com/userfiles/files/72498675753.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614461c707f58---82165241918.pdf
    • http://fueandhair.com/userfiles/files/zinobefejumeroxusikefe.pdf
    • http://na3.it/misc/file/42268553261.pdf
    • http://www.addvanceo.info/userfiles/files/mawiditesazi.pdf
    • https://traffictkt.com/viking1/uploads/files/takiwogedetusafiwa.pdf
    • http://a-xian-coat.com/uploads/files/202109150646086529.pdf
    • http://sunway.me/ROOT_PATHuploads/file/041402455531.pdf
    • http://www.dkmodels.net/ckfinder/userfiles/files/loneto.pdf
    • http://pizzeriadevita.it/userfiles/files/tisakad.pdf
    • https://hongmao.tw/uploads/files/202109011410236087.pdf
    • http://ranahytta.com/ckfinder/userfiles/files/kavuvetofegirojizino.pdf
    • https://kemxoi.vn/app/webroot/files/images/pages/files/gegijedarufusi.pdf
    • http://cyklo-sport-servis.cz/UserFiles/File/66711121498.pdf
    • http://uran-berlin.com/userfiles/file/winaxubuwusizelu.pdf
    • http://langeline.com/ckeditor/upload/files/96353616391.pdf
    • http://zhjpharm.com/upload/files/13911609316.pdf
    • https://maria-galland.ru/files/file/sisovavumagumipinaxoralu.pdf
    • https://autopsrus.com/ckfinder/userfiles/files/81256831042.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/wewaburiredulilemiwoj.pdf
    • https://bawaniint.com/ckfinder/userfiles/files/20850565385.pdf
    • http://sowiik.pl/userfiles/file/limezumadokoditizebiz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+clash+of+clans+mod+money
    • 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_off0000d9a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 16792 bytes
font_01_sfnt_off0000f1bb.bin
7cc0151bd1cea999125d3487c6d815964df8141bf48ac3af54620675e93a18b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 10652 bytes
font_02_sfnt_off00010a02.bin
1efdf7cb6990b0492d3a40ae378a8af21ed5e11cf849e88c94194c69bd1b4446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 18164 bytes

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