Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea6b3d7592fb9d4…

MALICIOUS

PDF

79.5 KB Created: 2021-08-04 12:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eb272918b0bef5c1f5295d1066f6e313 SHA-1: 98d85be9320e2bf054db93b38e76cd6f0577e924 SHA-256: 7ea6b3d7592fb9d4e09b7fa964e0bb883460298b9e9cca308358b6d766f89c87
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/sivexonafix.pdf In PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/jovipij.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/0a1eb56ef84549d36e36eeb30a4a82c7/pazugituwuwawefibijame.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/jedopereborawepagikukowo.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/dadibunobukupe.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/lenuxo.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/587d58cf1df06c7806f2ceebf6c49de4/gobifizuvurimivepurerava.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/79343747915.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/49429052590.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16083ae7fe0712---luposorinalogeramuziveb.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/16976117599.pdfIn PDF document text
    • http://kaies.cn/upfiles/210721131213283411ylr3l3.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade256b3724---79213411577.pdfIn PDF document text
    • https://afayl.com/userfiles/file/12796466462.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/dozoligokesoditesunupu.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/958acad3c8635598b028b21b2608ef31/96669001625.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609753ec9b8f5---molexulezimej.pdfIn PDF document text
    • http://fairview68.org/clients/c/ca/ca24e3df3ff7fa9b839de6c08aba9959/File/volazuxedoxigexatoput.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/008fcb26754a9c1ae0f1d55c45c88d7b/pivubulabiduvoxekomovojok.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/15b01c4f000ca5f60f253207a32fca79/femurepunoronav.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210615181151_np11yp.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acb0de79489---lokijupewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ryobi+scroll+saw+parts+canadaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 16616 bytes
SHA-256: 70100739b261fdb0036864741695fb026617c097d2e14281c2f9cea1c6e78b52
font_01_sfnt_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 10760 bytes
SHA-256: 64b5a33ed34f6cf50b81db619a14df360adf845fd793008117058a7e54a7bda6
font_02_sfnt_off000117c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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