Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cbd3547bdcf63d…

MALICIOUS

PDF

94.4 KB Created: 2021-08-07 05:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2890a2635dc248b18d9278974ed90c84 SHA-1: b1b872fa5169a5cbcd304c7a8efadb33a856120c SHA-256: 69cbd3547bdcf63dc1e5c29bc425a29222497d84746686af35c1f4053e9ba18c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these external links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/26de4efdf73d66e51d87fcb3b74705b6/92178282005.pdf In PDF document text
    • http://stolizstekla.ru/userfiles/file/52758920110.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb34aa11ad---webugunatogabuzukeram.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9e548ba6---lizazurefopekofunazifek.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/kosulazunebenisi.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/sukabopazekewopolawuxafo.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74d1568c94---kunuxakexitezikaw.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/87ktknd0ckjqr0gscvlaclkvu3/bugasu.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a569ab14be---gepidojuf.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607096a24b31a---36415684043.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/7916227700.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/b661ba546f120004ed39717f7fc215a5/63810767037.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7fa5804cf19addea64906419ce8f5a90/82433897757.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/nesosig.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/gamasanowepugidiwilonikib.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/volakod.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c53aeeb38---xozobafevejujabefapesole.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/uld8bc5sibpcdjjt2om493o03a/kotazerogujizefunirolevak.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/bc72aaca66e2150be7934271fc626b09/rabowivegirijojewizudow.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a70a12b202fc7e7acac37c25977a2a85/46995338581.pdfIn PDF document text
    • https://digireg.li/upload/fuxivo.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/javebawetepelosudevupa.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609536d96badf---sosodime.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/jifumudusanipotez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=roblox+id+codes+2020+hairPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 10792 bytes
SHA-256: 0f617954bf407a02722fa8657461f437813ffe7e2a5cc5dab7020ce9be63e758
font_02_sfnt_off00012334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12334 16612 bytes
SHA-256: 6fdbaa9084acb66aee3c49d46581a6d94ced6040d0a902d53dbd47b37fcfce2c
font_03_sfnt_off00013aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA2 18568 bytes
SHA-256: 45436a522aa37964cff10e67449908eeef32ed34fbb0e6ea06a79a06cf42eef8

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