Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed34dbe8d843a71c…

MALICIOUS

PDF

102.3 KB Created: 2021-07-02 14:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 86721d9ad7d786dd573a7e06ba95d364 SHA-1: 3b9499ba98fd5c6f9edb26d9c959eb519f97fb99 SHA-256: ed34dbe8d843a71ce6e2f08ecd82fd37a6563b6635219a56eabb3f990e71117c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs hosted on compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of multiple unknown URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://planetamama.ru/files/file/sedasugamazot.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d68dc33d8---10120062832.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/6253e23b19d630cde25d699ae9918482/99007293594.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746fbe5c496---nitajupizunifetevodorivij.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/lumanefetekijokufokekatap.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/vudelikipoxomeluri.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160984adc2e970---21194470638.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/34277991632.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825a1601d7a---lariwazadigaru.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mr4q471oivrfmshavn9btvodck/wisokeduguxewesazerotoje.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/276e8cfe51a82830c2ebd0fcbbfade66/damibupuzipe.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160867dea9482a---sekaxizuduzanuremazipow.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/121dea8a800227459c2d09d8557d1b45/30304263153.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/10577077875.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/bb1fe931ced9c62eb236acaf831f3bbd/xepavekawalijujekugox.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/xunebezetenikido.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/047e78cf64fca5e5d00ce4953e88b3bc/63545278746.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/29046932771.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074ff761d66a---nuletenugexamolodop.pdfIn PDF document text
    • http://rilta.net/userfiles/files/tudid.pdfIn PDF document text
    • http://goref.ru/files/file/nasewazumo.pdfIn PDF document text
    • http://cissi.it/userfiles/files/46109043801.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/bff77a51b8525216b68f3d29a87e5719/voluwudovewok.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/5hvb3imnqo2ll2j5mobghtd3p9/rolajoped.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e2198b321---49969317046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=lab+tests+for+hemolytic+transfusion+reactionPDF 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_off00012d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6C 17344 bytes
SHA-256: 5ca2457bd87f72722fa8c3e68ee3a318946984017af8d505b1b9d65c5e4a9726
font_01_sfnt_off00015a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6F 10912 bytes
SHA-256: 3b726e6f7027bf38ea30fdd66fd19295b8e5aff810ecc90ad4bf27cfc4de2cd8
font_02_sfnt_off0001739a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1739A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1