Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b285188495c210…

MALICIOUS

PDF

89.9 KB Created: 2022-05-18 17:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 60870a86bb4e44c4fe56a6d540a09ba0 SHA-1: 53fc4d3eff552333cd57bcccdb403f39fe210ab9 SHA-256: c5b285188495c210b246d534b22c43c79839b73dce13797f9e30b86402c61184
104 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and an external URI pointing to a suspicious domain, strongly indicating a phishing attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The primary goal appears to be redirecting the user to a malicious website for credential harvesting or further malware delivery.

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://fecuq.co.za/YmrXLWy8?keyword=mr%20smith%20goes%20to%20washington%20viewing%20guide%20answers%20free%20pdf%20free
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6b3db6cd4ce133a31081f3ca1b9631bf/jikemiwopejesab.pdf
    • http://avgustal.ru/kcfinder/upload/files/pabewekizefe.pdf
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/6881389.pdf
    • http://www.verneteco.com/ckfinder/userfiles/files/84761956341.pdf
    • http://qiuyutv.com/userfiles/files/20220302112544.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620168314d4c1---64501166217.pdf
    • http://apgicl.com/public/files/assets/ckeditor/kcfinder/upload/files/1440579230.pdf
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/woxopogu.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1625e98a7c5178---fixeta.pdf
    • https://dimafaxatabevex.weebly.com/uploads/1/3/5/9/135991177/ac64612a428d1f.pdf
    • https://fijitedutim.weebly.com/uploads/1/3/1/1/131164269/zekonidasevurosop.pdf
    • http://say-international.eu/userfiles/file/tevezijasoze.pdf
    • https://santevita-bg.com/ckfinder/userfiles/files/22580068028.pdf
    • https://tuxabonelunod.weebly.com/uploads/1/3/1/3/131379680/nawaxamom.pdf
    • http://belcanto-evenements.com/media/files/7540239472.pdf
    • http://omatsuri.kr/data/userfiles/files/jinefelugefewisazetifaw.pdf
    • http://cloverdiamond.com/file/pupudaborulajewoposub.pdf
    • https://gufonalika.weebly.com/uploads/1/3/4/0/134096228/1522770.pdf
    • https://vikesuluwok.weebly.com/uploads/1/3/4/7/134763763/5653275.pdf
    • https://fipuzabadoj.weebly.com/uploads/1/4/1/4/141426882/sozilezi.pdf
    • https://www.miroku-mfg.co.jp/system/js/kcfinder/upload/files/rokok.pdf
    • http://zekejozsef.eu/FCKfeltoltott/file/kedemenuregukokujutamufi.pdf
    • https://mubisajapesufu.weebly.com/uploads/1/3/4/6/134620746/zudosunux_sorojisoxuga_tiriwerebawa_jogebejuzep.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_off0000f870.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 16792 bytes
font_01_sfnt_off00011082.bin
ecc7a605b4ab00be42073f47cc8641e8de107d9614c0571f15ace9254240a558
pdf-font-stream PDF embedded font (sfnt) at offset 0x11082 17928 bytes
font_02_sfnt_off00013f47.bin
daa54fa92a1f1513752676a6c50cd8290136879233a2d216aa43f62a7cb136db
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F47 11144 bytes