Malicious PDF — malware analysis report

Static analysis result for SHA-256 f493c186419e6bf8…

MALICIOUS

PDF

72.9 KB Created: 2021-09-20 22:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: de766d3584b11adedf7c4dcca9df3961 SHA-1: bde5c931a079de8e48f5b87755c282a13e929565 SHA-256: f493c186419e6bf8459c52a69dfdaf19e802cca6cbc2bc2d55ed374c7e21b6c0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to PDF files hosted on compromised websites or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • 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://spotiverify.com/ci/userfiles/files/dixan.pdf In PDF document text
    • https://bloomlight.pl/_bloom/file/pigadozebobise.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/moveravekixowawimamasapu.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/c3g2p9a24dq5ampghihc0vsr61/xuxedojubixokav.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/78206458482.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/japopewudomivuwogitofu.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/rawep.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/70hu2gmk3okikie6elhvpksb82/sifivan.pdfIn PDF document text
    • https://geniodelweb.com/file/98489938474.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/50e93a5b82972f0712f23a91656f66af/94203676718.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/bofoket.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139e8b21c9ff---vijenimorixiwewel.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/sokesataz.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/tiwofedemol.pdfIn PDF document text
    • http://domuran.pl/files/file/80697730904.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/94631679619.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/dokiga.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/pebalazagafigabizegugal.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/11390778966.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366abc5268e---10809059322.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/0d0fe5d5e9c4df8fb655e3deffd4d0de/80552279441.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/rifogije.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388057dfe54---31264370252.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/ramaravewo.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/gajisobetaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fashion+designing+basics+sketching+pdfPDF 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_off0000bd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD28 15536 bytes
SHA-256: 13c4b51e44c204b912e30eac8a5ea900a9e44137fc6a7183bc7cda2930404cf9
font_01_sfnt_off0000e49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49E 10964 bytes
SHA-256: 44b0e8c338c59e8ba1a639dd8cdbbd2ab795ec0005dcc1e49425bafac5e75db5
font_02_sfnt_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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