Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05f00425714b63c…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 01:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ec1083ad55f2fd66b992cd43d938d79 SHA-1: df8a422d6c643454cfe9e9befc09f0181b6cd199 SHA-256: d05f00425714b63c60c5acf87f9b4f79e9f72b7a6eae5bf232bb2bf65101de51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. The presence of a link farm on compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.truckersplantparts.co.uk/ckfinder/userfiles/files/waworudekuduvumimuj.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac259c01166---11288640822.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/kutizinafididozavex.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/40770071541.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/20575085360899b5d0754e.pdfIn PDF document text
    • http://koala-al.com/d/files/22303415166.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210627_184705.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b59fd7a2e23---sujowozovapujaxer.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/jasuzekixorikamokut.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/87515029838.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4afa1fd8e---tipulixosuwixifej.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/93984862631.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/56251005897.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e036a46b2d---63577840097.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b9379826b---pujejikosawagaregegef.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/lepovawokinavagar.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021072410113373499.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/niranezezi.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/60968410695.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/64491081712.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/xepigupexakekisude.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/zowaxanerevusagepegogo.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/u8q2d88c824u6luv565378o200/xuwoxesusopujedapufenak.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/76a55ebe7914c614ecd088c41d6c9846/61238630036.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160af497f25a92---2692926824.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16081e28ada282---36251209774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ray+dalio+principles+for+success+pdfPDF 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_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 17608 bytes
SHA-256: de67f6726b1e64a868398d7def564bde764d0c9309cc94ef864e3570ac5bc8be
font_01_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 10772 bytes
SHA-256: 83ea452df9a56dd0333e679b7b0b9d24a0a3eb0f63690b011c1674ff6ac41c85
font_02_sfnt_off00012284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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