Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d800a319d47a9ef…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 22:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f107f46a12d93faeaeb58769575c329d SHA-1: 533364df103bc1c1fed851df462e92f1036e5ec7 SHA-256: 9d800a319d47a9ef9adfbe7a30defe1b4a7c38efca715ccb26f0f054a6488b75
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many hosted on compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics points to an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fecba16867---22668609474.pdf In PDF document text
    • http://czpohledavky.cz/userfiles/files/48523000083.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/44551695185.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/13840387529.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/ziditujox.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/83671866507.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/73116767230.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139b7cb1cbdb---tujotalojulodut.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/suzoweromap.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/49703752687.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/29140247357.pdfIn PDF document text
    • https://netlandschool.cl/files/lilixikimitipugifudoturaw.pdfIn PDF document text
    • http://orenprom.com/img/account/file/57603244428.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/borarazononawonivojezu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b0f1bfad3---gipumoxatatuto.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/zokamiladizula.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/lojigomisid.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/zisipevagideto.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/vegabezajuxifavirobej.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/47486957066.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136922248042---tavazidanos.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/rodufesoputenetatiwaxogi.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/pegepejuzusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=shiva+the+superhero+2+full+movie+in+tamil+download+tamilrockersPDF 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_off0000d798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD798 11424 bytes
SHA-256: 03cb2ad1bae1245cc970ce67729bd59c4c317c4b3779ebad1f50052311c06e58
font_01_sfnt_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 17996 bytes
SHA-256: 325556c7b1166c427035fb22433ae76b29142f40a91852b124815edf1b14f2ee
font_02_sfnt_off00012187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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