Malicious PDF — malware analysis report

Static analysis result for SHA-256 443aebf8dbeefd60…

MALICIOUS

PDF

62.2 KB Created: 2021-09-26 14:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5bc9b0480445b5b20550750e5076da83 SHA-1: 62cb2e18c4f291ae3b0def91affc9abbc6364473 SHA-256: 443aebf8dbeefd60b26a4b8af8db7133ac2e060f18fb0875f93953a81c73fa49
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

Heuristics 4

  • 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
  • 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://drafthe.ru/uplcv?utm_term=theme+app+for+android PDF link annotation
    • http://trunghungplastic.com/luutru/files/69975178163.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/volumidoxukunazoxobin.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/kedorovupid.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/juxejawerogozo.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/dijijefuserilob.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/eafqhd3mnoa3ef766e8rkgg9gg/44078301586.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/57161859025.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/46051921933.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/wajinereburulazar.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/vedupijefoxutiwebek.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/62903677334.pdfIn PDF document text
    • http://metallpress.info/files/folajagolipoxajopuninowed.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/96349084008.pdfIn PDF document text
    • https://adci.vn/data/upload/file/87057207097.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/fojabuzi.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/mevepofajo.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/93854469869.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/21742178343.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/jagowipuzoje.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8984719ac---87223165158.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/lokagozagot.pdfIn PDF document text
    • https://mauspro.net/upload/files/wabunuzopebaru.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/38341323302.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210903101350.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 15180 bytes
SHA-256: ceb370df258014b9f707adcf70fa08f94ab186791112300d218313a005fe36f4
font_01_sfnt_off0000d4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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