Malicious PDF — malware analysis report

Static analysis result for SHA-256 096ff3327c3fe346…

MALICIOUS

PDF

63.6 KB Created: 2021-09-21 00:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 01e0da8bf5e8884c6e7138feac0235c5 SHA-1: ef50b06f8c4c4db233deeab46c7535a110891cf3 SHA-256: 096ff3327c3fe346bd4bf188ad7b14766829e97fb01d2788be572b16fea2161f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code. The heuristics indicate this JavaScript is likely used to redirect users to a link farm, as evidenced by the numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' firing. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.malagatour.es/ckfinder/userfiles/files/xedipugubokinujomepefo.pdf In PDF document text
    • http://sysquare.com/UserFiles/files/53863387788.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/dofomajigovogopumapibos.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/sadav.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/rodifubijorifizuwidumejob.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/rewabafuwuvitudizujasi.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/12993392473.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/55143351781.pdfIn PDF document text
    • http://elitacasa.it/images/file/mukabotofapuribibero.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/woluvubukobuvave.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/sozevamisezokotuw.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/36020679907.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210911032535_3wpzpg.pdfIn PDF document text
    • http://chinalabware.es/d/files/vaxawox.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/zopofapu.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/zasasosifitelelilo.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/88041104223.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/vosijubinukofilawefatib.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/83494038359.pdfIn PDF document text
    • http://test-immo.com/file/xiruxisajemogosazotaliv.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137377e60f15---lebasupafuraxekizugenaz.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143d79213acf---55808038475.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210905_257FF424CC21AAC2.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/30424356117.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/16346485719.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/vekel.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/88926346552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=paired+data+statisticsPDF link annotation
    • 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_off0000d4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AC 17704 bytes
SHA-256: a7d23fa0ed5327d82e993053e7fe2116dc694f966a96945e32cb98f458e6dccd

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