Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eed1b07040bbe78…

MALICIOUS

PDF

81.1 KB Created: 2021-08-20 14:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 780c5befeb90d29661f154dce65a535b SHA-1: a61efa1e0151d503c8364129c819bb3c4be48c71 SHA-256: 4eed1b07040bbe78c97cd2e8d2a553654b25fa6bc489d268c166f928b60d6efb
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

This PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating it's part of a phishing campaign. The heuristics suggest it's a lure for MFA or one-time code harvesting, likely to facilitate credential theft or session hijacking. The presence of embedded JavaScript and the nature of the URLs strongly suggest an attempt to download and execute a second-stage payload, possibly disguised as a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901744867be---17396394476.pdf In PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/64597472752.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/27/file/20210627_062219_140.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/67bfbad6c811b2113e0779f2c566d053/wujujudezasizojekor.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/7678034685.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866bd5a139e---39056832969.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160784dcb2fb7f---86330686592.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/a571093119e6adfcaf2babcb3b723572/pomuk.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/kafadarivuvitejar.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/kirejulodeg.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/66806811215.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/85654080395.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e901d2e979a---rukib.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/900cfeda77801831f12f5ecf032c1b4b/39689968347.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/eec408c7c684fe219d1cc064fe92f8f2/15883500123.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/favufufonefelolu.pdfIn PDF document text
    • http://budka39.ru/files/64559138355.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/18288365296.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d949aa56b91---14269231351.pdfIn PDF document text
    • https://bataretak.com/img/files/file/zawit.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/zelezawelorajawosobideb.pdfIn PDF document text
    • http://didula.com/img/file/paziwoxotodigabiri.pdfIn PDF document text
    • http://phunhai.net/upload/files/wuwoxezaleba.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/bexonexodovov.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/32427724783.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=snapchat+password+hack+tool+no+human+verificationPDF 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_off0000d629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 11304 bytes
SHA-256: b55aaa954539fc88bd865108963951d9e819dcc88aba24b796b09b93c27416e6
font_02_sfnt_off000108ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 16780 bytes
SHA-256: 4b12ae527cf111ec96fbb157e8c81cc676bd53c81f103a8ec956d4ec3adf9c09

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