Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b4ab9e48233db1…

MALICIOUS

PDF

53.0 KB Created: 2021-10-17 01:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 44019b8b63d395d46d4e75980d5077b0 SHA-1: 6bd9e0b33bf84b61d9469bde4daf495bb5140dc9 SHA-256: a2b4ab9e48233db1bf004b96921a7e4b6450678102f1bf29294de170d724957a
124 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to link farms, with one heuristic specifically identifying it as a link farm on disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific lure, but the overall structure and URL distribution suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5591

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://tongkhomica.com/upload/files/12586265849.pdf In PDF document text
    • http://ttccid.com/userfiles/files/kotokojogugujoni.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/fixaruboxod.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cb5085d8f5cdecdd8a2ad09db77b3ed0/83232488158.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/kikukokegovarizupor.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/magiteribubamifupu.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/69495078679.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/31113725479.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/lenepekigejabage.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202110170606579953.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/60847496886.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/kupuxoxux.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/34095092234.pdfIn PDF document text
    • http://eventechsite.com/files/files/71050883606.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/58835041869.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/36743022915.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141126deac09---wusitatu.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/fejoxa.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/pexirewatijavejakufuraza.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/54227809165.pdfIn PDF document text
    • http://sushi-belovo.ru/files/99402624518.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/mafagibomuforaxafuxowik.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/4075447175.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/87329519531.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/cmwvf4RlXg4/uplcv?utm_term=r+coding+softwarePDF link annotation