Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad208141189406d…

MALICIOUS

PDF

77.3 KB Created: 2021-09-24 03:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f409156dbeddea19575058b15a75e4d4 SHA-1: 25eef64958186d253dbfb1f8ddd9a625d4bdd309 SHA-256: fad208141189406d5f1e537a311163b782ef3802b4de323c86bf6ea98d5bdcbf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, indicating a link farm designed to redirect users. The presence of these links and the overall structure suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://alde-pace.org/ckfinder/userfiles/files/73353528808.pdf In PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/zijobelepezejixowifu.pdfIn PDF document text
    • https://interangkorcondominium.com/userfiles/file/molujef.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/tubisotexokemokutesutiw.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/nb344vb6f5ol7olgor6rnv9jv7/61699123906.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210902234800.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/af9889fbb2d4623f80ff2e7948dbdd3c/76048513233.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/3454626764.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/bowoxamezupos.pdfIn PDF document text
    • https://krossi.ru/images/content/files/19365789999.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/78294732538.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/lusebumiliwezolebasuzim.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/timodujejetopojoge.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/124045441.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/nodegin.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/lewuwodugituxifas.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-17/20210917094914950086.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/59209514665.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/58415685526.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/79531154113.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/73331343687.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/15992666083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=imap+calendar+androidPDF 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_off0000c9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 10360 bytes
SHA-256: 5576d938f75f8e37c4f64860b2b36094d64037b13a8f01da6ae65a5fd4990d15
font_02_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 17952 bytes
SHA-256: eb998c1a5f8e210f0918414c7a7477cc7b4ae91271aa4ad7c8c7c299bb94a4e0

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