Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63f5fb2214f7484…

MALICIOUS

PDF

64.0 KB Created: 2021-09-25 12:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: cdc929e41a710701b9f8bde1f1ce6648 SHA-1: add475f33c8f9b103e64121432a4dc59f7676819 SHA-256: c63f5fb2214f74845f51867f23b0a6615c32c2b15c11a602bc36e5c1bbb46180
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. The document contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, suggesting a phishing or scam attempt. The presence of a 'utm_term_redirector' heuristic further supports this, indicating a focus on redirecting users through multiple links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6228

Heuristics 4

  • 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
  • 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://vrajacreation.com/uploaded_files/userfiles/files/18106812101.pdf In PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/65833353131.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/87790970460.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/dujugibo.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/jifexesajenujarave.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/34267603269.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce6dc71bd7---toxufikozisogojo.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/72516812351.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/popixurugusoxajunexalero.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/sokir.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/nelutisunagimojejibejovad.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/49880591568.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/mabebujusat.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/26895944617.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/80ce818a98f6c539141bfe4679d8554e/mabalupupejapubafulek.pdfIn PDF document text
    • https://33mobility.net/uploads/files/lujaruvazafavedusopore.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210914_F751E50E189D6A37.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/rujusebelokaw.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/45938010917.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/torotuxudu.pdfIn PDF document text
    • https://andreivieru.com/ckfinder/userfiles/files/34983112506.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/31258763403.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/52383661333.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/94689612908.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/54312592759.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/zexebid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=private+dns+automatic+androidPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/tegaxepobuzasiw.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_off0000b97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97B 19100 bytes
SHA-256: b4042f949a09f136fd05cc5437f66b78969043978f9bc9135549fb083a57e658
font_01_sfnt_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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