Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfa02bd19147bb1…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 13:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acf71b59a1e22421c2084056031c27d9 SHA-1: 9a832dcb2ef8914e942b5c896251e52a0503bb8f SHA-256: 3dfa02bd19147bb12bdddd47f7402b0ace863737e6e4999d03f95c0ba321558a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://rh4-h1tapi-turbo.com/contents/files/43147197680.pdf
    • https://ndmoyun.com/calisma2/files/uploads/70209680350.pdf
    • http://sva-jeanroze.com/xmedia/file/rakilotozorufuzubik.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945284af846---tagelemevowimupexun.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911ca71b171---fiwoxijozujuvif.pdf
    • https://amoslodge10.org/ckfinder/userfiles/files/texuravefoditejilak.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/9d7c495e9f9c37870a3e33105636b3d9/mixol.pdf
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/vujatamibupabuzerosugol.pdf
    • https://pachetedeturism.ro/images/files/leparuzoboligaduziwujita.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608a43768d922---12789448107.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e1e818e0---86405786307.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080ba33de890---besudolibimusizorejugawaz.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/qof3tner9d5o9n03soh0jaj2bi/47112298763.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/6981a9e065a237d0118c91bd85a832f4/jisanuwur.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/gijolex.pdf
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/kodunuros.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/37503989516.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceaf30ee6a---xepetege.pdf
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/53209039934.pdf
    • http://scales-center.com/shop/fck_file/file/37335446763.pdf
    • http://yorktownhs1987.com/clients/57482/File/linosejizonefababo.pdf
    • https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/8cuu881ebmctmarlc474f8r8r1/75779439714.pdf
    • https://chptravel.ir/data/file/lijor.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=never+let+me+go+book+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 16792 bytes
font_01_sfnt_off0000eb13.bin
249b196159e8015b1cccef1db32df99d5a3e938c194709ae2edde210b7a37ff2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 10940 bytes
font_02_sfnt_off00010411.bin
49c25cf763e58b4c74acc6f77b49efa6f00b98dfeb8abc964a70a24d7e1ad579
pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 17616 bytes