Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e0f39ea072468e…

MALICIOUS

PDF

79.6 KB Created: 2021-09-16 11:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c33bfdf28a3c58cf77ecf4cbdcd64046 SHA-1: 304e122270b7d7671d38d580298802d2a6c69cb6 SHA-256: b0e0f39ea072468e2f59f33a16a29401b4a98aa12a6a958a4f3d295713af51d4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The presence of numerous external URIs, many pointing to disposable domains and identified as a link farm, strongly suggests a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://farmacieitaliane.com/documenti/file/xadapoxawobokulos.pdf In PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/72550935731.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/296thituapondnp0uagf5db9us/gipalaxavu.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/98764111324.pdfIn PDF document text
    • http://balbu.hu/uploads/news/file/31335648282.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/10398490864.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/53822889518.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/28117618246.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/woduva.pdfIn PDF document text
    • http://minipit.com/data/files/9315470706.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/77683782951.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/1179375616.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/25811925419.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c94b6e93ec---vofirikapidizas.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/12881120926.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/bipobagopurijiposenodo.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/kevibepupaniguxolagogexiw.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/35134178432.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/loxidatijozilu.pdfIn PDF document text
    • http://fitviewer.biz/files/file/bozatifegor.pdfIn PDF document text
    • http://osayit.com/images/file/ramibi.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/nagutivexuzotovafip.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/12540334345.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/surowo.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/67967457884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+japanese+skincare+revolution+pdf+free+downloadPDF link annotation
    • 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_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 21732 bytes
SHA-256: c816450941d6ec31172464d3e15336298a4dcde8af0d879ab684afe5e7a0b140