Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2eb5db1d3413b5…

MALICIOUS

PDF

77.5 KB Created: 2021-09-06 12:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 27f99820f3c696db67fe7ac1e1884bf1 SHA-1: d317c5453c9bd6568e5ca1dd61e5e4b61fc4750c SHA-256: 5d2eb5db1d3413b5cb3b3cb999e10cec15a288a11428d1103051f1081d88a5c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://bahia-group.com/ckfinder/userfiles/files/35784090216.pdf In PDF document text
    • http://gelateriacool.it/userfiles/files/mizelaxoxuzab.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607772e5c2b17---8843263218.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec29cb91b---zafoganudovabiwudedomo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e6b33bfb4---2009870880.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f27905a888b17089cc0611b019df0909/30340948423.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/gejipiwigimiganabibigof.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/mazubudoxakinelabibuto.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/5s237qf57optdqdjjnocft3h86/bonuxexutebusurevage.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/997a86484a474239101ac78b8ccf0600/buguxiwelimejitupu.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/rovabezowizobatadijo.pdfIn PDF document text
    • http://abpaluso.com/upload/file/26101825119.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210904234729.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/01c66052906cb187c519e36db964b915/40945464971.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/18087921403.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/710673b6db920b2d7a6608b810596edb/gijuwa.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/39660125106.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/dilafi.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/42945235120.pdfIn PDF document text
    • http://alkanboya.com/files/file///bepipori.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0228caf6f2---zafuzituz.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/e1b357ee8852725eccbe6e82c9a27b0d/21846163008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=2005+ford+taurus+repair+manual+pdf+freePDF 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_off0000cb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 11036 bytes
SHA-256: 905400e48a4a85f44671715e875cf0e0c56e41a6d52cd79ae02c5823a1b755ff
font_02_sfnt_off0000fcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 16608 bytes
SHA-256: c6f611d04b27a077a1cb5a7a58e8448b90cc180f0ec67aeae18d8bbcb06306b6

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