Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c47c7bb6cdcb640…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 15:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 582d92cc28970cccf099f17a23ce1adf SHA-1: 70ac9425af20321964a527bc0a1d791cc90b8d49 SHA-256: 4c47c7bb6cdcb64010cc130939fb690a6c6737205e251aa52ddf43d5b222b745
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/rafazixeli.pdf In PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/pixiwesavekejirujuxel.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/98d236fa348b4024499155212a97f442/zobowabixoburak.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faf3210f116---zedirijiriwimiwapolom.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/vikidavuxixog.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/vuzujaxalaxelebobefu.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/fesotofoko.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95340595258.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/95676463289.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/37327759945.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/94154062914.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca1d04be4a---jepikibezoke.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/7c9b52d0a0ec10c63eab804eafa2da1d/demevul.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/xubuxazamikarapagov.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160781a35a34e9---71348324984.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/mefiruxot.pdfIn PDF document text
    • http://altus.pl/userfiles/file/litegi.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109041853387264.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210823145456.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/46826490191.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/223vcpm2us9h2n7047dklq8lva/pewopafezodot.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/totorujidexiguge.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a537f5c51c9---pepidobudevinezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=jasper+report+java+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_off0000c686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC686 10436 bytes
SHA-256: 44a8c8c0bf7af367efdb41c8a3e20146563dd598a7dec3257e5e9e94a1c20aac
font_01_sfnt_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 16260 bytes
SHA-256: 7ddae4547e117b40a23e21bb6814da8ea6f52ffba1d69d13e3dfb2f6653b505b
font_02_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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