Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77ff6d2c2f3da42…

MALICIOUS

PDF

55.4 KB Created: 2021-09-29 08:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cfea6bf2e04f983fd4923cdd30b25db8 SHA-1: 4a9fd949ee755538ae13403fc6eb8a2de06b1e63 SHA-256: b77ff6d2c2f3da425fa93020a55a43622deee657526cae61c1ad0d5b4f41f5ae
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URIs, including one hosted on 'roomyab.ir', suggests an attempt to lead the user to a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8091

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://roomyab.ir/basefile/roomyabir/files/tonepule.pdf In PDF document text
    • http://strandedtattoo.com/file/zufumed.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///mobisoxulav.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139616ddcc33---kuzizasak.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/24231882442.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/72468676359.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/fekofifijusilanoziwul.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/10484554828.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/jozedifovofubow.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/pipodokajagikuloxoto.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/16560751862.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/k5579ie41tk945baes4888vik5/73197710488.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/rusisuganag.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/35618439798.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/sasuvogefesusabaleti.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/50460791622.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/kemudowadabixig.pdfIn PDF document text
    • http://glttek.com/userfiles/file/papisimidemureg.pdfIn PDF document text
    • https://777mto.org/contents/files/dasokajizipejuko.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/58805614113.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/36558499819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=endless+night+agatha+christie+pdf+downloadPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/70952104355.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_off0000bf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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