Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65546115969ff8b…

MALICIOUS

PDF

100.5 KB Created: 2021-07-15 12:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2dd5bce05bea2b1a5eb2ad6e02ca8d9d SHA-1: 11b9aaca3bd049cd0e7372620635359300b77dc2 SHA-256: e65546115969ff8b485af33982edf6f014462b61475ea90fecf1cfd3f3a81924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/67638d6d784b50f5ea77b0650ba83cef/72926126205.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/rulefuxopetizujelenat.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/cqni2onitrhqbm3rrfauma5316/ximutobiroruzurunaz.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebce95e06a---nebidiripelade.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070312a205fe---fesup.pdfIn PDF document text
    • http://kiemtoanhaiphong.vn/upload/files/safikukapi.pdfIn PDF document text
    • https://comiconfezioni.it/file/nivimedanugibatuze.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/fbc79fb17525e191517574a8497c0ac2/gipufopipatitato.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rcehoe88l12iffrfcose6cvpdt/96390195774.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/44106873222.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/towedurejibesuzavuku.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f7d7066dc72c35f9085aec41618f496/lujade.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/hc3u6j3f6hs6nqmuta7va5kcqc/sajusepunitafelexijovelom.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9d273f65.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/33581266282.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/747c45c93c00169d406e17f2fb0272c7/53342600723.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ee0t6g4gajqmf41b0ffuf1qk9r/moremubikujomegaxibe.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/819b7c36aacf77e3729d122fb8da7270/fitavudekoxarog.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844caa65cc7---68638027767.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/rorozex.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/57a450ff4764edd52650a9c8ebb3c477/81162788126.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/gipikukuzilugirimazesis.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/tofopovugifexefibanerikaw.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/317a4984cbe867379631d14d1f8ebfb3/23455619744.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af237dc7e28---dapuxejekok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+evolved+form+of+rowletPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 16204 bytes
SHA-256: 87182b243460dea918596d3037f4802ab1ae8d6e248e9f9623f677a34ab0a0a9
font_01_sfnt_off0001171b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171B 2444 bytes
SHA-256: f4e5fa2490cd0c69b7a6dd984f2425d1a571145cae385035cc2d8c51a27d7882
font_02_sfnt_off000121b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B5 19080 bytes
SHA-256: a7301bda047dd0b40746ea7bab864984655f8c223850dc97bda6afe981248b82
font_03_sfnt_off000152d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D7 10208 bytes
SHA-256: e1bc29ab6b762bc6a4e9df1dc4bac3cdc07d2a599091f48c26915bde3cab00d2
font_04_sfnt_off000169cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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