Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9df9e4ee7017cd6…

MALICIOUS

PDF

73.6 KB Created: 2021-09-25 19:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 87d1a2c1db87b2d8c73f8760459e821e SHA-1: 7d7cf9e57e9cc3b8af97d00c1bf186a992e94486 SHA-256: f9df9e4ee7017cd67653782c9cb8a8856d483a46b5a32a33c21ee5aa64b5b057
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 numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is used to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://technoprofile.ru/userfiles/file/wadonawegowep.pdf In PDF document text
    • https://webaprint.be/img/file/disusaruko.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/belebelorefusim.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/50752136153.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/pibepemalosilujefekalol.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/gubivu.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/45344952756.pdfIn PDF document text
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/73231996915.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/1cb564051637effb299568e7b5cd6f33/vobujiriwilomavalazupoviw.pdfIn PDF document text
    • http://na3.it/misc/file/fupomin.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/57994337302.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210924_FBD95A5F9103CCF6.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/jajuvugun.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/31680328753.pdfIn PDF document text
    • https://bunianco.com/other_files/File/39286910483.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/96594861945.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/bagifef.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/58985164147.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/64172907739.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/sevakoboxujamixukemegise.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa6004a0ed---kisezotitujusi.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/dutojewijubuzatorozupi.pdfIn PDF document text
    • http://badgerhillfarm.uk/21271953373.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210918092302.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/rugirijekimalebabeduk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+download+antutu+benchmarkPDF 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_off0000b679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB679 10784 bytes
SHA-256: 8e4c39dabf78710bf0c2a1757d78db7b79fcf5cf5913d616ff15a54f633b0aac
font_01_sfnt_off0000cf1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 19308 bytes
SHA-256: d424804889f0bf2d85b415a9e1c34d4fe6338a781de1da794f6cb78a741d8783

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