Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecdee0c8de0af3d…

MALICIOUS

PDF

62.6 KB Created: 2021-09-23 17:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 50e78e0031857088cbddf3d1d8cffd0c SHA-1: 53968f9df4148458076138a66a29bbfc284b9959 SHA-256: 2ecdee0c8de0af3df0d36860df02fa37369621e0e9c2ca1301993cf32bf11fd8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7451

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://archism.ru/uplcv?utm_term=android+vulnerability+database PDF link annotation
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/cb2179e4b36817b370551b597f7b63de/57817302575.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/67287157918.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/52592618618.pdfIn PDF document text
    • https://phnews.ro/files/file/fudubenewavegikivodoj.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/d34c3ece6530485b9d348b2618e8327a/70384131823.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/5390262295.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1632094275.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/27251520241.pdfIn PDF document text
    • http://keitbg.com/images/files/92919677323.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/13072500096.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/83481372505.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210919001707.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/87044688259.pdfIn PDF document text
    • https://thermaltrailrace.com/imagini_ws/10397597591.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/rozazesafiludamosiz.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/nisavazivev.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/xedefinivukupub.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/47898347358.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/dulaberanaxubeji.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/laxunofivopebetedupa.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/29080508830.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/53520201289.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/27959794537.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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