Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdb0ec8b902ea28…

MALICIOUS

PDF

84.7 KB Created: 2021-07-04 05:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 62b63ebb72113914363b235789373817 SHA-1: 1257e338ecbc01c15d03f529df2adb95885b939f SHA-256: 7cdb0ec8b902ea28e244e65d8ee854655b0bbd2f82f9a4002b42484138ef13cb
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The embedded URLs suggest an attempt to redirect users to malicious or phishing content, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/db91d6a92de80ce37826fca024cd152e/pemajanewo.pdf In PDF document text
    • http://scandirent-new.ru/uploads/assets/file/76762950200.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/favimupafabonuf.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b3f757fc---lawelovekelorinovopufo.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/71886655883.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c0d29554f---wotokufikelipojenigogopit.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/gopusisojebaxus.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/63444404425.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/e270da2ee5169bd27aa9691284338d4b/93924685423.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/bisotisadixorebevo.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/pegulenamaxumu.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5c472b1ed---wofujane.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd02f7fa44---9879365676.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/2272804778.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab1550ff1a---daxalexumitazibin.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c21203155fe---77903280851.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/1a600ts68nmcvrjgjd76f4dodc/56801607530.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/vodobafemiv.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7434d6f88---kanivijumulirol.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/60803554347.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/2e5f3e8cf85dc6de8b87e9e428bc697a/74298866107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=note+to+pdf+converterPDF 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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 17120 bytes
SHA-256: 9e204492e8065462e2dcf846175eefdd3a7f76880c7d68393cc89e01b48a921d
font_01_sfnt_off00011714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11714 10188 bytes
SHA-256: dd6b46b1947be3fc49073d3442fadec073bf95ad60290464972fbb52491747c6
font_02_sfnt_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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