Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd193431451b555…

MALICIOUS

PDF

259.6 KB Created: 2021-07-15 22:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 29c02f743e39737f21e6ff78a48580cf SHA-1: 09ddb2ce9ccb725b1c24556946e5760edfe3b820 SHA-256: cfd193431451b55520c598776279ce7bb2bedd1b121c513591e0761edc7b9ef3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a tactic to distribute malicious content. The file's structure and embedded URLs strongly indicate it's part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8841

Heuristics 5

  • 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.
  • 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://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078e82cd6441---77070120381.pdf In PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/jawexofagem.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/prhrcn66ab3gcbu2vcdb7uo6q6/4327373514.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/daxiwakoloxeratemilagu.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/91c16f7a2e8a3f0867a5a0cf3eb8d851/nutobinazaveta.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/bbler47ce3eqtt5pjpjg8gfv5a/xabonivax.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///gofodixojupexitel.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7726da1a340c484de64da4fc7929841f/redoxanutafidul.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35b756fed9---nidixipapibefapumegafifa.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/28520463191.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/41895310293.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072c8caa3719---daxegasuniviz.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f888fc39e9---34071342753.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c921cd3701---rawowomolaje.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16096b56ba5eda---somemisoxobibumafaxu.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9ffef1cdad48f605605647dda482e662/48721735930.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e5f39428f376ea96ad083969d4e19763/45116088932.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160baff5ce5d8f---sinososeluwoximizowuromi.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160782bb9477e3---tevujizopetop.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/14885004799.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26baf6b127---74990312419.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2b798603---68861887187.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/mazuropusuwipori.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210601150751.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5414c9114cf37f675464da9eef5b9779/34237156261.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/metovesiwaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=virtue+of+helping+othersPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00037621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37621 1704 bytes
SHA-256: e4f035f98972946864e5ec6b782be1ab20aab397120685f0370b3fba311b69c8
font_01_sfnt_off00037e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37E2B 10544 bytes
SHA-256: d2e6b009cbd1ee896d9efa4cf15ba9250f338de1b33ef34034dac1a6d487caf3
font_02_sfnt_off00039628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39628 22140 bytes
SHA-256: 127c83a71775bd86c7bc0b96aeacde3e20f7c33f11b0510810255fd1ae76094f
font_03_sfnt_off0003cec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CEC4 17196 bytes
SHA-256: 30acd1c4271bc3181c9f2961e308700fc2438c9bf1af639f1dd722e8fe744bc4
font_04_sfnt_off0003e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E78B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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