Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4e419d7f246d56…

MALICIOUS

PDF

75.6 KB Created: 2021-09-07 04:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c806c7e1faf4b08a38256c6991122224 SHA-1: 0d13595b3b85987024d9748a652646eeeba1b683 SHA-256: 3d4e419d7f246d566c3f145f1e933f9a9e1bd99e82c01918728e3de7ecb5da76
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various websites, some hosted on compromised WordPress installations. The primary lure appears to be a 'repair manual' for a Delonghi Magnifica, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/uplcv?utm_term=delonghi+magnifica+repair+manual+pdf PDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847c0c7f1ab---wumabolepok.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210620032804.pdfIn PDF document text
    • https://blokhol.com/upload/files/pifekupexizakerixexol.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/acef2b2ce0f5c22f8bb2ebacff828e52/jubevu.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0e4167d08---87930878355.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e09a6f2762fa2b56fafafea6dec06ab7/dubelenenenapege.pdfIn PDF document text
    • http://xnkvinatimex.com/uploads/files/59218596628.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/lafeviguxivitixuzetarol.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933d9073d0e---gewabilabuk.pdfIn PDF document text
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/95346070467.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba734635d---votesatitelezad.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/bavukosiput.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/251719516360.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/watofulirodinonowuv.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c386117896---gepotodotepugipo.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/bepujiv.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/12816876252.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c068eb9254---zajuvelavub.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/e53ab49cf1c35202be421f8a68f391ac/pupenedodoz.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/45117333884.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/84498383398.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_off0000c41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41F 10904 bytes
SHA-256: bd5b96941fdfafcad0bf8646e7c11c07e420dd6c046586dc710742be84954b0c
font_01_sfnt_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 16812 bytes
SHA-256: 79e9ff98f354b5f3ed68cd58f5c6e79ab858bda4bb9d7fb50e3b9d3bea2497ec

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