Malicious PDF — malware analysis report

Static analysis result for SHA-256 62079f1e8a782efb…

MALICIOUS

PDF

62.4 KB Created: 2021-09-16 12:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c97efe400c4b54081fd1a1a88aa4271f SHA-1: 1ea376e5212e4c1deaed5537fb18c059cbb91bad SHA-256: 62079f1e8a782efb18937ae39a65d61d72dd21f9721c38d76061d2b3d803a746
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8184

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://ketchas.ru/uplcv?utm_term=download+clouthub+app PDF link annotation
    • http://mrs724.ir/basefile/drtiketcom/files/37608262586.pdfIn PDF document text
    • http://balbu.eu/uploads/news/file/resagipadukoriwepib.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/lojuwafuto.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/35869617405.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/96038661255.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/45016166232.pdfIn PDF document text
    • https://esvigo.com/upload/files/6680048298.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/xudozovebalixijedina.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef6f65c6b5---gikolipavi.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210911_221303.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/leposemukiwaba.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/95859245910.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/sutuwokabolip.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/mapolavelogetuf.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/zesamatatilufusovira.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/fimusidurowomugivimida.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/vebemupijavenamatanis.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/93443115582.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_off0000cdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB5 10444 bytes
SHA-256: 56696e844e6e148c4fd2a6309a512231dd4e99e2aa4b761e34d4d4ce39cc2b3f
font_01_sfnt_off0000e529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1