Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b242373f60bcb8…

MALICIOUS

PDF

79.6 KB Created: 2021-09-18 14:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7e4ed106b67ed0b7aa1f479ad7d7e0a2 SHA-1: 69574bd3e21a3ae0da5a4395cf7d0d5ddc6b1f8b SHA-256: e9b242373f60bcb8bee375854782034f9cf5b140562d2126ebe7ee04d1d2fbc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. One URL, 'https://allytemp.ru/uplcv?utm_term=android+phone+not+reading+sd+card', is particularly notable. The file's structure and the nature of the URLs indicate a phishing or malware distribution 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://allytemp.ru/uplcv?utm_term=android+phone+not+reading+sd+card PDF link annotation
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/e5081535d069a8f89943bd0722b346c1/zolugebebi.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/wobadilurixesedep.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/97747843192.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161404ab1ac349---34175621752.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/36816227307.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/21432943161.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138b8ca7a0a5---mudevonagunikuvatesinod.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/romuvit.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/kakova.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/suzigukuxupupumefagulak.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/56538815723.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/mesasojidufisebojomekotez.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/likafebi.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/fevaxutarezin.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/90305490094.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/79135181238.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210914120441.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/74583115654.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/zilabiwotabanapawuzaju.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/vorumiwurude.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/73348822740.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/87c32ee2316c4963c5711b1fbed6a13b/68884264310.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631576280_ae9165b7fe.pdfIn PDF document text
    • 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_off0000d242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD242 17720 bytes
SHA-256: 9170bef15d8f55e176c12a1560f4551e87b2df9e5b6dfddbdc03ee35cd5e2926
font_01_sfnt_off0001008e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 10728 bytes
SHA-256: e84c6e2aa42324b2c36bfc8bc617bf2a7e7332f36cbece5578482bc812a0ec43
font_02_sfnt_off000118f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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