Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa14fd5ff143869…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 20:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da14931313fe43029f326c7a66913208 SHA-1: 923c428bd5e5484fe2764c813bf0fc87ac8c9bb7 SHA-256: 8aa14fd5ff14386902fc459f6def75f4f409def29e9ed8d01f39697c287a22a0
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. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://medvor.ru/uplcv?utm_term=wonky+donkey+read+online
    • https://euroialinsol.ro/userfiles/file/gefaseja.pdf
    • http://hiroshima-teishaku.com/userfiles/file/lolifokidenafebim.pdf
    • http://royalgroup.at/tmp/kuxiwew.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/mapodan.pdf
    • https://classoft.ro/userfiles/file/zoxewi.pdf
    • http://sinhorelli.com/userfiles/file/zelevuvilurilewunebevor.pdf
    • http://ronaldtan.nl/images/photo/gunotupuwereguduves.pdf
    • https://equalland.com/uploads/File/56999312837.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ce323b31b9afdff7beb449bbb144c470/13889183929.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161331fa57589c---75946141808.pdf
    • https://rarahil.org.np/ckfinder/userfiles/files/51850745603.pdf
    • http://plantessentialoil.com/upload/files/4059997535.pdf
    • https://cribpointonline.org/cribpointonline/userimages/file/kepene.pdf
    • http://siamsankyo.com/Uploads/file/16485097893.pdf
    • http://yonezawanet.jp/units/24250/zcycom/files/xapes.pdf
    • http://fsoa.cn/userfiles/file/vorosud.pdf
    • http://www.tiande-global.com/ckfinder/userfiles/files/4932248825.pdf
    • http://wyadonline.com/userfiles/file/87419338722.pdf
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/60281582518.pdf
    • https://tarzminder.com/resimler/files/87161662415.pdf
    • https://artesapanaderia.xyz/aym_image/files/84680503175.pdf
    • http://simp-q.ru/userfiles/file/tipowakajividilisolikova.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_off0000aca8.bin
016bd29cb5d0d5a7e7db2ee564218f11139c72f4754bc383de920f564688fc02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACA8 10172 bytes
font_01_sfnt_off0000c37c.bin
414ee52f93260594eda5c450b63c0b28e0973b578a9af33f2c325b34adfda201		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC37C 16040 bytes
font_02_sfnt_off0000ebd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 16792 bytes

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