Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e96551b7b20e04…

MALICIOUS

PDF

84.0 KB Created: 2021-09-10 05:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9340874444dcd64a84b3e87e86042663 SHA-1: e0602a59ab86b4b8c562b2726f434e16003f79db SHA-256: f5e96551b7b20e04791de4b50b21781601c1889c29a6b9f88084312115b69043
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://groupunsur3.com/contents/files/563197942.pdf In PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b696f2a48---lebebabe.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/99353999061.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/texomakeneloruwaneredakaz.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22434021126.pdfIn PDF document text
    • http://synfarm.com/upload/files/ximajegetufanupumuromese.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/kadukadudetuju.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/mejikafokozulevopu.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/215541280.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/laviwiwosutibigutizosijo.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/1335859119.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133b9cab4845---20884149027.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/11394935298.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/sojilarekenirur.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6285cf922---78942355897.pdfIn PDF document text
    • http://allycatering.com/userfiles/naxizefar.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/gagelufojixefa.pdfIn PDF document text
    • http://enkepharma.com/upload/files/651043586.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/86469663881.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/85029787243.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/sikiridobibazeso.pdfIn PDF document text
    • https://mollis.rs/files/ruzovasale.pdfIn PDF document text
    • http://sacc-la-chaux-de-fonds.ch/fichiers/file/47347557312.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136eb68be163---wefojidur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=badnaam+gali+watch+full+movie+onlinePDF 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_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 18016 bytes
SHA-256: 9ecb4dc80b86516ec2ebfbc4518d528eddf71ecba9e595f970ad4c546a6d4920
font_02_sfnt_off00012928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12928 10960 bytes
SHA-256: b574d590b1e8325d3de3dd301fee88af131da214b274c41f9611e3158f67022b

Open this report in the interactive analyzer, or submit your own file for analysis.