Malicious PDF — malware analysis report

Static analysis result for SHA-256 885593d2071d3502…

MALICIOUS

PDF

129.2 KB Created: 2021-07-28 10:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2ab4a1c175d93803d8c55b65c4bbf43 SHA-1: dc6c9ecffc24c03e1557ce3bba2f08a09a970bc5 SHA-256: 885593d2071d350238a25503c7259339b50acbc64163f36e66bd99a3274f7c6e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3793

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chothuexehochiminh.com/userfiles/file/62599356094.pdf
    • http://coinmarketsuite.com/ckfinder/userfiles/files/49025388505.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608419f477286---retemibuka.pdf
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/48663746031.pdf
    • http://www.allatpatikapecs.hu/images/file/71810873761.pdf
    • https://kisikana.hr/userfiles/file/12916431141.pdf
    • http://bigband-ulm.de/userfiles/files/jejewobotofufud.pdf
    • http://shbaicun.com/userfiles/file/2021072803015373499.pdf
    • http://assistance.uz/images/shared/file/99030252372.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d8b2f429---notaxabivenesozibut.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c2704732f4d22f094d879fdc0159b8d5/2352312635.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b9bc9856d74e0b31cdee7105c99def51/47765419278.pdf
    • http://simonide.org/userfiles/file/15940909100.pdf
    • http://cameranichietsu.com/luutru/files/sasavujavegidawubaza.pdf
    • http://ipmarketing.net/userfiles/file/xedesudobusenirosubaxita.pdf
    • http://m2m2design.com/userfiles/68834360395.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/xebopezo.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0edc1123df3b78a9bc194e31342b0716/bidinusivajomenafunapubu.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160753b2667730---wirubitozumijij.pdf
    • https://bhsbeacon.com/FCKeditor/file/givevam.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/4kd6vc7jljbea8bcjdcml32cls/wenodabezibilalubumunafol.pdf
    • http://acgroupenterprise.com/userfiles/file/taxane.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faf44052fac---17433424176.pdf
    • http://colescastle.com/clients/875019/File/78032270845.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/33645388253.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=jurassic+park+3+full+movie+english+hd+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a403.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A403 16792 bytes
font_01_sfnt_off0001bc15.bin
d2e6fc9f5c1fb752b0e0198e500ce7945778a838b27c0d7b27b6686e25684845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC15 18196 bytes
font_02_sfnt_off0001ebf2.bin
a2f9d115be890724b8ea08d2bd008465af212148ca2baa1af6955ca3cdd2570e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBF2 11476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.