Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d06ae4a8f277311…

MALICIOUS

PDF

82.1 KB Created: 2021-08-04 13:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1cf6cd7e90a5534dc03d7c88eca1bf6a SHA-1: 37c5f5f7d70d1e460b71a44fafdb6dabf154379f SHA-256: 2d06ae4a8f277311bfa5b112e698e7f3d3be8b9a1ad8bb38ffa65d45b584696c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to websites hosted on compromised Content Management Systems (CMS) or utilize disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160961d6be2869---24870154945.pdf In PDF document text
    • http://allycatering.com/userfiles/55580701472.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbcfd25ef6---77554712101.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/gi3p2spsi074lpq6rbl3omv2a7/kutozokufisunagez.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071f74044d9e---10297439492.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6q8l902mrkj04nfiuigotdpr6c/tuwifukolofaf.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aeb401959---76618882837.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/60754821343.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210704015457.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc7cc19280---57431911036.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/98481609746.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/0rufjk8pnhee1gqn8cmcs2702q/diwifumonufuputimukutul.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/42726476861.pdfIn PDF document text
    • https://netpage.info/userfiles/file/golewatuwusur.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b033b915facf79a1a53e76933f1e9ba0/55992506149.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/gobarozapiputajiv.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/38016708580.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/ragisobewavetesamevuna.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/dodunokes.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/xivogiwovorumogevurev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cambridge+ket+speaking+test+pdfPDF 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_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 10936 bytes
SHA-256: c2b5661dd2515cc79217b0739b60954fc59316cb965d34b812c7e4970e4daf42
font_01_sfnt_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 17120 bytes
SHA-256: 2e759a7fabb96936db00310859c44d8dc6591320eae3450a06ab5f848d6717a1
font_02_sfnt_off0001207e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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