Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7cae0042cb75de…

MALICIOUS

PDF

89.3 KB Created: 2021-08-01 07:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ae8b0a47b2869543175934b142af76dd SHA-1: b8c0d905e7fe9e36892f44a7bb896a036ab319f8 SHA-256: fc7cae0042cb75de4fa1eb080c598dfe42bc92d0ae1b3c8681306e7b4d173983
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host malicious files or redirect users. The presence of urgency language further supports a phishing lure. No scripts were extracted, but the PDF structure and linked URLs are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/iihtmbjkfvpgb8o3ujaapupl4r/jiliwowe.pdf In PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64bb3df145---bumumekilefujivud.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/56987125920.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e9a12f174---63597113041.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/67156607177.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/5161165053.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/33ea13a5c8d68f75717b9d48a7d8ae07/60899123491.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/soxadikaz.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/78631741898.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/s11jphu9f6e6n7qhko2evgevs0/8024187428.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/059cef495e4fa039398e25f65aab0aca/loloz.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/12331990970.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/15238596979.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/57t1mien8eeg55olt5ra8lfnbc/borumiwugozusatazatalapil.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/1067cfa974c22e44772497f0576f9b26/zudemusebepusovafe.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/pf44rk3mmtd98tjmlltimt9j73/jikuwamo.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/66450133611.pdfIn PDF document text
    • https://eternalbliss.net/file/78444041335.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/6jm1qjr7seogc5bipkuo5nhdp9/94511089431.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/83734617064.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077154ebf69e---lorosex.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/237f69acce44f6088c6654a08dcc3e50/37510472197.pdfIn PDF document text
    • http://dgjst.com/upfile/file/96665534813.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/92573940796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+reset+seiko+radio+wave+control+clockPDF 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_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED8 17968 bytes
SHA-256: a64c107034c688f27317cb8fb924052e207ab30cddd6cdf70e3d8b7dfad8da45
font_02_sfnt_off00013e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1C 10596 bytes
SHA-256: b0304fdf850a97007eb7a62d29b5b02188f88a40bbf08020710b7f6363f41033

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