Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6e08670e2aa96b…

MALICIOUS

PDF

102.9 KB Created: 2021-07-03 13:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3634645a971e94a8b9e37277a70c34ef SHA-1: 7513e65f9485f483a33f4063b30f6d8197521807 SHA-256: ce6e08670e2aa96b819b06815bceae42170879fadea735cb9d31597522c7a433
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The primary attack pattern involves luring users to click on these links, which are hosted on domains like bazatalty.pl and joefairless.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/2dff5063fa863239fa2787e422cedd5d/bosoximezovadijebobagutu.pdf In PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5d10c7eb---83468458167.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c065a9c76b5---79266731815.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79582732330.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b02b3f081---89732120583.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/777a67hnuea5hk0adn3lhluea9/82786975210.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/82182ca34d43b95d07315864473c35e8/66775948111.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/gusonurupun.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/b0319ce6a9497c0885dd19ce5f40652c/13685261852.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/706a972c18265b9e16bf075e4b190579/javewejabik.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/ludutunedibitolabi.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/860811881.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/vimubiviwun.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-7-2/20210702030449794864.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a433bc7e2---39948493817.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160757484406fc---dejalixinoragixokivibi.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/kolavugimoxutopobe.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/79571220047.pdfIn PDF document text
    • http://usateatop.com/_upload/files/27250662431.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/75816696327.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e23918b6871c04fb309989a6039f8d6c/68519441551.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/37cd59e379e4ab4ed71085fd74b16e46/mezexib.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f3a12a8c2e459e656c13949bfd67300f/11781479980.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160877dd47b735---bafafakowi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/24141722539.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bee2ebfd7---58684218293.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/38156505624.pdfIn PDF document text
    • http://ned.ru/uploads/files/volewudixezutewolup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=affiliated+meaning+in+tagalogPDF 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_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 10412 bytes
SHA-256: f2e72ae14d761faea683fc0666644702ba1d17b0b8c9b6be52c10c718a97c5de
font_01_sfnt_off00013fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE3 20800 bytes
SHA-256: 37688fa6105cf3f68626e8782ea77e25c8f5f9df928dd0b90a2572b36713adb8
font_02_sfnt_off000175b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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