Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29367675b4ccf2d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-22 09:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8b75fe6cda94068d6b08f34bc3b7caeb SHA-1: 02ba583b7dfedf929a39c0b7d5615a4567229b49 SHA-256: e29367675b4ccf2d7c4fa21302d58af166697b60fdd7f14f04701886a1dc72c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting it's used to distribute phishing content or further malware. The presence of external URIs and link farms strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=how+to+find+app+on+android+phone PDF link annotation
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/4a07d0bdb0ec7a68e7dfa1fbc93f438a/nokuvu.pdfIn PDF document text
    • http://capri.lt/userfiles/files/897322068.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/21484791154.pdfIn PDF document text
    • http://marketingnews.fr/images/file/66585175745.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/sojaluxuvixazufumuzadak.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408bf27fd81---71663690863.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/19637528056.pdfIn PDF document text
    • https://kluchar.net/klucharnet/images/file/96804876420.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/31072928672.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/13409815910.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/bumamolokegipijakuneku.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/aef1781641ae0e4a86e676f4a9fa5c54/22438180561.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210922151319.pdfIn PDF document text
    • http://art-ball.net/files/file/54608797908.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/funupafawalurav.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/sosojikow.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/tupajamefavonezixatozuka.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/35228140208.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/49291968628.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/doputulir.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/tenitiw.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/37351225562.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de06ade3f9---63778594170.pdfIn PDF document text
    • 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_off0000d3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DE 10456 bytes
SHA-256: 322cbc888b8d41e12f4a85c95b21f6ee8adc48c8755a80b55740cb07e8376b13
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 18508 bytes
SHA-256: 2dbd23c793a76b8d1411bda020828a1e9405177d36ea6d911d3dec3a60d7130e