Malicious PDF — malware analysis report

Static analysis result for SHA-256 221293444d6db6d4…

MALICIOUS

PDF

87.4 KB Created: 2021-07-01 00:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c75b09a80490fa1072989e44412ed610 SHA-1: 9db2ee5076c9e5ae608d8e8be0817fad0e73ce72 SHA-256: 221293444d6db6d4b17b6dc3a23da0057004c1745aaa596677bbd267794ee7a7
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was flagged by a ML classifier and ClamAV as malicious, with ClamAV identifying it as a phishing trojan. The presence of multiple embedded URLs, some pointing to suspicious PDF files hosted on compromised websites, suggests an attempt to deliver a secondary payload. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34c41a03f---6403938756.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071557f2ea03---wodiwunerobekemuw.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608eca8153780---vunokevag.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1keu69v8ors7vnffjb1ld88ccq/pifopefiwomatisamuje.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4be077bc74---6297815874.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/5e572cb37bce67301b8daf35295ee3a6/sinigo.pdf
    • https://webmenuplus.com/images/file/malenesulaviruxaxazap.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-7-1/20210701053730509431.pdf
    • https://tortugafilms.ca/adminfiles/file/47564547469.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d9e188f1f---pulibokani.pdf
    • http://ankaser.com/userfiles/file/48888724324.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/195219d68675dee337925d8d3ebe14f8/51293082091.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ffa5b2167---fujagawi.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160dc212d94680---zugiwekosazixip.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b3a7e63f5---tiparuwatebezuju.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/21nok2ahuv9d8go7vsid9bdibl/77337744282.pdf
    • https://arerp.kr/data/file///6429018069.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609481d0c06ca---kibikovumewerobamobadux.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2453f1bea33bfbee2acb5774e2cd5102/12769494672.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c264a93031---rakaganabamap.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a96167f1236---85241416891.pdf
    • http://sl-light.ru/design/img/upload/file/lileladiwe.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607146ae75949---33763986784.pdf
    • http://charivne.info/images/file/mavetum.pdf
    • https://blugarden.eu/file/40043413413.pdf
    • http://autohondl.cz/userfiles/file/80506277569.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=i+before+e+except+after+c+words+list
    • 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_off0000f08a.bin
252ba8b605ed5753e80df1547baaf837289e3da281ce337a6727fdc01dde5867		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10788 bytes
font_01_sfnt_off0001095d.bin
7b8fbc47e17662622610841cae3be4719018102bf0a655143101df45d5ad99f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 17276 bytes
font_02_sfnt_off0001364f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1364F 16792 bytes

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