Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66200e2949853d0…

MALICIOUS

PDF

71.4 KB Created: 2021-09-24 12:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 284f552af9dcee8effe67ae4910b1401 SHA-1: 59650612ff93273438013ad1d14b5a57a3445f69 SHA-256: c66200e2949853d08236c74c2c2fabd5226a248ad5f744a1861b0fb70e7aae76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/ninipujoxiziwesarow.pdf In PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/leteti.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/43007821101.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a86feb57b26925f9eba74c03469b1b58/vifotum.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/vivoluzisutenidafa.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/75526953437.pdfIn PDF document text
    • http://melvin.cz/data/kobetipotusanup.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/tajabuto.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/xivukepusajujonagel.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01b164324---jotekozodipuriros.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f22887a07---29030838764.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/74496030062.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/9519546615.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/zizoxaxamuterum.pdfIn PDF document text
    • https://ms01bet.com/contents/files/14892992980.pdfIn PDF document text
    • https://promise-land.com/upload/file/futavigojawu.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/lodug.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/raselejitevawijulike.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c5210ad233d954d5cb4bdf0cce7c0aea/fafejinejokenewetalamisiv.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/menerogapazapip.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/muzibakufumileza.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/41596441779.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614866ac786d8---56396630168.pdfIn PDF document text
    • http://mindennapi.hu/upload/file/50844307987.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/38449019224.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/zevudefutali.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dhufn6f947tg1gtraglm319u5d/5667524002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cannot+download+apps+on+android+tabletPDF 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_off0000b4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DA 10644 bytes
SHA-256: 411c6b3ded4e3b1f2a7b50a0e1011c675fea6ecb7ca8384c2071a66f1d354693
font_01_sfnt_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 16716 bytes
SHA-256: d5aa12952c09c079fd7c015718aa1c697ba7a2d4285842638951a8718cd3d32a
font_02_sfnt_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1