Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d200017255e384…

MALICIOUS

PDF

106.9 KB Created: 2021-08-26 07:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 0a041f3a0878bb650fd7e3bf007b772b SHA-1: cbf3b0dfc3ad1c45783886cbefd590d4dfd6e23d SHA-256: d7d200017255e38489b7c565978925c6657ae85b3fffb4bbafb5e69d4c994868
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

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://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123cda9277dd---matotunusinixasegade.pdf In PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/xezemiwotafebapefa.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7164046953---88147943796.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/fasinalesukepofiwa.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160874a0f52972---48653332624.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608ec990c20f5---50554192726.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/xuvokonuzukaxeviva.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/fininenipumozip.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad8953685a---15442318266.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4778c834cd1126e354d62637f83b2975/21739332314.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/10c86310973be0d3d7086fef88ea0fb9/37384662371.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/genujaroxirelufap.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088971033c2a---61012456269.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/db2ab06c84d48dc19054e7267bd43212/15746830821.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161153ebf8a3f2---pevitef.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/30368006321.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/gujumugobipo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/1810gr5rneoelgua7aih3kff81/44714285266.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/zowadagulob.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/15932329911.pdfIn PDF document text
    • https://fuoriscena.eu/file/88180327873.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/21553648865.pdfIn PDF document text
    • https://moolans.com/uploads/files/84689876065.pdfIn PDF document text
    • http://bakoca.hu/files/file/65016667770.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=inclined+meaning+in+physicsPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 10708 bytes
SHA-256: 245f885e641b8f38c99c63aae1871b15cc32f59ab7388eff6efb94ee7c5f7277
font_01_sfnt_off00012b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B81 21692 bytes
SHA-256: 1aee2eb1b5f16d2b8d87163a682360f8daf6e765062e9a21be0211630c97bd33
font_02_sfnt_off00016126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16126 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17933 2028 bytes
SHA-256: da3cddec762c472a55d1c4d1881d5974aac6c4ccf8790b927bd90cbd8213cd2a
font_04_sfnt_off00018264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18264 17120 bytes
SHA-256: 3f65fc96cc2415e62eddd7368799d81196a5821efa6e30dd38fec04b696dff41