Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b801cee4daf535b…

MALICIOUS

PDF

76.6 KB Created: 2021-09-19 01:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 67163a0020bd9f8cbd4d36d61e44da54 SHA-1: eb84c1ec037f328276c8c545057d26f6d12b66a0 SHA-256: 9b801cee4daf535bf1776a2caee72792c9f04243523b2466013aa25c54175c92
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=love+yourself+heal+your+life+pdf PDF link annotation
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/28857667457.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/71646257027.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210916_060038.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/sixugiramatudeguwunas.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/kovekog.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/besabofunisapivuxuwaxora.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/44404724430.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/15195479961.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614048752dad3---mitofiminif.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/66499159873.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/ranatij.pdfIn PDF document text
    • http://cssh.es/img/file/viguzazabonegabodu.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090613124273499.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/vimedonedimurotuwenapu.pdfIn PDF document text
    • https://123natura.com/stockages/files/laraz.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/kazefidab.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/99636038574.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pafagawimupile.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/vigujupogemavekeguvenaw.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-10/20210910085135110197.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/kisuzisaxatoxerosotux.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/90718754000.pdfIn PDF document text
    • http://progetec.org/userfiles/files/89303510743.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/bidobiwoxok.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/96373920211.pdfIn PDF document text
    • 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_off0000c839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 17008 bytes
SHA-256: 6eb4745d16d5aee737d4715af868cb5d88ddf3b3f42c2436f8536c74a249c6b9
font_02_sfnt_off00010c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 10628 bytes
SHA-256: 8653af5d43f9eab0c85d7afcdf19c02db5b510abce6fe4d7e46c56591923c095

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