Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec57d319078eb9e…

MALICIOUS

PDF

65.2 KB Created: 2021-09-08 11:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2edc1887dd613126e5d1aad6855bb009 SHA-1: a988addf5fa6fba3a126b0c51b45118afbaffc1c SHA-256: 1ec57d319078eb9e5fb8761ce8876ccc6df730542ee58ad138e6706ee9d10c0a
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites. These links are likely intended to lure users into phishing scams or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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
  • 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
  • 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://infrive.ru/uplcv?utm_term=mackie+16+channel+mixer+manual PDF link annotation
    • http://vaness-sens.fr/ckfinder/userfiles/files/xerigirilimigum.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/76563649929.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/fitalavogenawe.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/surenetidetopil.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d50fd6ef29---63514258651.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/lorowebiranabubitexa.pdfIn PDF document text
    • https://tepihtrava.rs//files/64431813900.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/59796982365.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/zunasuximi.pdfIn PDF document text
    • https://securitydm.com/slicice/file/jozinuraxezimodexata.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/jurusikekerinedula.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/mugesutewurabajad.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/88731425241.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/megukipobusuwetebuwozol.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/kazijo.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/guginesenudatosijuzone.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161338f478a7f5---polasirijumoli.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7dd09c674---81934793937.pdfIn PDF document text
    • https://windsbs.biz/files/file/23898984568.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/nekuzibow.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/f4bf19b05d1026f57706f07832f96038/33002176279.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/133cf12bf87e769f4749692c32333afc/72161864946.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608789c213c68---xazasolowolategisowetuta.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 10616 bytes
SHA-256: 18a6f0c541435cf3b2c3b03186c15eaa25073281338fed9f16fb8126a35b83f5

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