Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cda0684b93519a…

MALICIOUS

PDF

68.3 KB Created: 2021-09-16 21:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 937007ad712eb28af07fdb93a0dbf6c0 SHA-1: 5755929cb0650af9d1d2be8ae5aadf3924517d3c SHA-256: 33cda0684b93519af1e119b2adae4f4fb75e08fb1f5f3ccbfd80f5ee019faf10
124 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. The document contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content or phishing sites. No scripts were extracted, but the structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8341

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 https://appchecar.com/ckfinder/userfiles/files/75911453282.pdf In PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/mafupimadegigemoda.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/1764522486.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/j692rol6mhkg3fcplk0vpp1qs9/zilif.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/wiluzafiwuxuxamu.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/mosimogiforev.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/17922022820.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/2444556847.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/66121548017.pdfIn PDF document text
    • https://pindimana.in/uploads/file/fapeweduwuseveka.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/80653356122.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/xakotupinazibodefulexomon.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/1149029693.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/55074042075.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/10522172238.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/wakunetoriwuro.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/sosabomitulasunuveboseg.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/fopevogadakal.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/romufekobexilisazekapa.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/foxibo.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/jofixutesijul.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/kifipewowo.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/nexubidezepuxogutivi.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/34875945443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=android+battery+cycle+countPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/84118992403.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 10532 bytes
SHA-256: 8f1564aac486981d9ca9599f313b1a513b177563028b0632280c1d95dea7b916