Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf20b0c34e89432…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 20:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1730757415775a9af2580190c2b8d822 SHA-1: 5d5d0021d8d92a0b3e914361db97341d34995c81 SHA-256: 3bf20b0c34e89432a150708ff65db051fefeb2b278537bb2b0295f3c86765442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pezenasenchantee.fr/userfiles/file/22741092940.pdf In PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/30632601532.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a08b7492---57800917239.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/16409692138.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161027ce8bd882---18407324303.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de386ed0c4---57325830295.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dab51e6b14f---35891461731.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/38284031456.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb035532409---2767098009.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf61c140e2---desesixidegi.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/21922275445.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0b8e52591aaf17f13def6ddc5329bdc7/43779943503.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/jawikedekulakuworuzagadu.pdfIn PDF document text
    • https://lecachet.fr/docs/files/dodejigiwufuvafaketir.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/80752071028.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ffe15a10540---fifukaripafifunukejim.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/55cf0f4c7d1e12b94dc2e1189f494cb4/53444846819.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6760ee0dc6---26994019610.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb12298bca---89717066395.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608d317712d1c---dulaluvupotelukekeput.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/36da3cfb81ab0dc87d30e9a80041716d/91697711683.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/xepazema.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/mugilafagokeroxatoda.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/95017322720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=baby+weight+percentile+at+birthPDF 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_off0000ee54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 10756 bytes
SHA-256: f7634bcde2362f6fd1c0b87baa0a6bf7d9a40e1a6658a94e0e10c02cda4e5b8e
font_01_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 17572 bytes
SHA-256: 82e89b95152a1aae59ab3370d0b940381f111bbfc6a1f02ee2e0eb3b2cbacfb6
font_02_sfnt_off00013497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13497 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.