Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d634eb768d43340…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 14:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4356bc12aa6a6e40fa4918414de313a SHA-1: c4608b4a779c665f7a5e90c8033498f401a13a93 SHA-256: 6d634eb768d4334087f6648edce3d11e4f780e1b09366db5eac58bdd4ed775a7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, one of which points to a raw IP address, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload. The document body is heavily obfuscated and unreadable, providing no further context on the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c97c732967e---vodixipinapow.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2ba974e3b---xireko.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ad986184355---1908084130.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/ludurilikixiju.pdf
    • http://work4shop.cz/userfiles/file/47373151640.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ba43m3f1dqfahh19cbta18joj6/53760078795.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/392da52502f3f3536c27c62acdc27495/popof.pdf
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/29318124243.pdf
    • https://elnativocoffee.com/silver/upload/files/wimewejibavoxufusugirase.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3e8b8ffa50088159a8d8a533f91054eb/tefebudaza.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/3u6p9s3bh47vvp2jk9mh09ai2a/pozesobefeguwinekar.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a668bd89f30---72806565550.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5b7b26886---duziviwosuvopewe.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e8a984ff0ceaa6cf711447b67e3d54b5/seruvejim.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099db00b4d29---rurozanimufuv.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160911a93931f2---16077669625.pdf
    • https://tezerwatch.com/file/upload/files/06-11-09-47-22-42.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/af8d10b45df2ab9d7c67e760d806cbfa/widerikemalofuv.pdf
    • http://assushop.com/userfiles/assushop.com/file/kigepibugavofisixunux.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/f05gm1krj6i36kooh8f29oadh1/fifedulol.pdf
    • http://i-daa-wl.de/userfiles/66976299270.pdf
    • http://nadiadsa.org/userfiles/file/52847341226.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758137409ae---lijukene.pdf
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/h2lm7ecmq7p151hhnun853ok5s/mafakepuzadoguwawemawi.pdf
    • http://ggmtc.net/userfiles/files/rudivupateboduzi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=red+and+dark
    • 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_off0000faae.bin
e328f2e4c4be897dc5ee39997b725705e2cb787ffc53b61649e236851ad2404f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAE 17176 bytes
font_01_sfnt_off00012766.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 16792 bytes
font_02_sfnt_off00013f7c.bin
fe9810cf34102c4bec09dbfe6ef246dfd3925e82e7b2f2c60f5f867480f16c95
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7C 9852 bytes