Malicious PDF — malware analysis report

Static analysis result for SHA-256 d225bf2f226a3e7d…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 08:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7dd9258f430f60ec05a8cb31f6d9e759 SHA-1: ebe60e680383f87ceec22a95c9803ad566c887cd SHA-256: d225bf2f226a3e7d734ec8f5a6621a38340cf9f5eb96fb3e7cc62caaee786a80
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pixomot.ru/uplcv?utm_term=recover+deleted+text+messages+android+with+computer PDF link annotation
    • http://kyea.org/imageuploads/sirunuke.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///devofepakobemudow.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16130a5af2a385---65098397151.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613163840e53b---27435752772.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/25079392014.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/6561250469.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/xozedokisonomuzirof.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/27644578756.pdfIn PDF document text
    • http://poiskvod.ru/images/file/2578584982.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/sisubopuripilikeruwamo.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/98257186356.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/zolamufoxoxe.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/43491755610.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/17108343e85a296aecd7a1fb103cb97a/valigabototiri.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/56476082426.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/cec3c65628efa492fd949031dc5d9a5a/11621824304.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/90855603167.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b95d29c57f---navedizopovavoxiziwepibuj.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d095b61d6---46957644231.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/jinixewo.pdfIn PDF document text
    • http://unseretochter.ch/images/file/51973177235.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/865750219613b9b17cdc81.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_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 11360 bytes
SHA-256: 43fe136eaf87695438dbb89ba574ea534510df8687e6904b13e121ed72bea7de
font_02_sfnt_off000114e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E9 17552 bytes
SHA-256: e2e8fa44eeefc7b21609aae0186dd8240af62e0cfdd28664ca7b30ee8b2792af

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