Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e37995a9a80e0b…

MALICIOUS

PDF

78.9 KB Created: 2022-05-27 08:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: a61287816c56be05fadde337a77e4350 SHA-1: 6d9e27677304a5a1054ea089521ed8cb0a504658 SHA-256: d8e37995a9a80e0bcb364dd3ff89ca398cac47f7be02864015cc9ac59fada52e
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains an embedded JavaScript stream and an external URI pointing to a suspicious domain, indicating an attempt to deliver a malicious payload. The ML classifier and ClamAV detection strongly suggest malicious intent, likely a phishing or trojan delivery mechanism. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL and JS stream are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cafij.co.za/YmrXLWy8?keyword=dancing%20queen%20sheet%20music%20for%20piano%20printable%20free%20printable
    • http://sibmaxi.ru/userfiles/file/1931428699.pdf
    • http://air-con.ru/upload/files/galepajolusifuba.pdf
    • https://iamtimeshare.com/userfiles/file/98015629132.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1627f5807cb5ec---xasawazoxakujedudabez.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16248f245edf4a---sigibakurevaxofiw.pdf
    • https://jixevimevulu.weebly.com/uploads/1/3/4/6/134659689/1320856.pdf
    • http://lexnovum.pl/js/kcfinder/upload/files/51306383839.pdf
    • https://aildf.in/userfiles/file/delavebupu.pdf
    • https://maria-galland.ru/files/file/88225227600.pdf
    • https://nojolagixig.weebly.com/uploads/1/4/1/3/141318405/f7a479f8.pdf
    • http://kngsm.in/userfiles/file/39427547124.pdf
    • https://xtremefitksa.com/ckfinder/userfiles/files/tojowuwalosidat.pdf
    • http://healthmindsacademy.com/admin/ckeditor/kcfinder/upload/files/18466669791.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1627acf290225e---38290349158.pdf
    • https://fefikeforapi.weebly.com/uploads/1/4/1/4/141484671/6184840.pdf
    • https://exprescredit.md/userfiles/file/94976542695.pdf
    • https://domainedulacstellan.com/admin/kcfinder/upload/files/94755894094.pdf
    • http://luatsugiadinhviet.com/upload/ck/files/1496038298.pdf
    • http://gnbc-global.com/app/webroot/js/kcfinder/upload/files/padowabuke.pdf
    • http://waterlootour.com/FileData/ckfinder/files/20220211_08F6532EB03015B9.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626d3242247bb---488300573.pdf
    • https://xurigatunirefor.weebly.com/uploads/1/3/4/6/134635133/42606cd6.pdf
    • https://rowevitos.weebly.com/uploads/1/3/4/6/134687190/segoki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off0000ccfc.bin
af3999704c7dfb54287b096e96a57a924f892e0eb5fc8fb0438ed889cbddcd89
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 11312 bytes
font_01_sfnt_off0000e6dc.bin
85f183d4ddd658cdebb445e41f041e41bc20dc1d11114bd38d64a50244de4ec8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DC 17516 bytes
font_02_sfnt_off000114ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 16792 bytes