Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd06ec5a771d97b7…

MALICIOUS

PDF

90.8 KB Created: 2021-09-08 10:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 32cad0ac51aa6c4147d74913ea6fdfc0 SHA-1: f792e914d5caed59036d1582d812d57fc5376c0f SHA-256: cd06ec5a771d97b7b259055de700790b00972c5f100b7bc530af80fc25639031
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting sites. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery, which aligns with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://laborke.ru/uplcv?utm_term=tommee+tippee+single+bottle+steriliser+manual PDF link annotation
    • http://animationcoach.com/userfiles/file/34377241267.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/402c90b3adb48dbb57a9de471f5e7b77/zagoseg.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210811_025246.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/883c1de2b77c29d1fbcbe19bd7d0404d/ritexonolidekafejeder.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad84ed6451c---vanexo.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/93218130364.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/99042869613.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210806093555.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160d565d44b8b8---sapaladuneruluvapelifexe.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/98575822830.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/walidigajewakuxepu.pdfIn PDF document text
    • http://nessium.net/userfiles/file/zudomipuxike.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/suresipixobuka.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630202175.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/sevabivakaguvomamu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e918ca5c7---jadizajilewado.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/165760f9b245b38d7945adafde60e72c/46332473501.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a583a38bde234c34b574afdb0643055f/90708429216.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/ea41011af5cb34c2cfd21768fa24b5b7/dezanimopekidilukok.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/56391210149.pdfIn PDF document text
    • http://princeverma.in/uploads/files/12914693126.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/44256406867.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f310db6d702954480a33dbe6236648c5/63562307524.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/xepenaxukilulopuv.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/43241721666.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_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 10796 bytes
SHA-256: d90c12cfbcfaa2649cd172880df8530e47ec155c07fc651710b1e40fbf713535
font_01_sfnt_off000115ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 18180 bytes
SHA-256: d940f2084a388ee589e00e24f5112a5bb599a992397ec210473e5ca96f77d182
font_02_sfnt_off0001453c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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