Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb00ea38fd80286a…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 19:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c283366f0a8698552450a67b01df5939 SHA-1: 785223e7d1d74413b081cd37ee40f1ba82b6f78f SHA-256: eb00ea38fd80286a31b1828b8aaeeea3eda04cba99811492b5b24b305982828d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, 'https://botokaw.ru/wix?keyword=doodle+god+alchemy+recipes', suggests a lure related to game information. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=doodle+god+alchemy+recipes
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5fea353a56cf2.pdf
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fda550102007.pdf
    • https://cdn-cms.f-static.net/uploads/4459796/normal_6029880464735.pdf
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fc6a45a913c1.pdf
    • https://darifojiwuz.weebly.com/uploads/1/3/4/5/134588766/zajexesubu_sitetudune.pdf
    • http://mamefumiwuto.mywebcommunity.org/cours_espagnol_debutant.pdf
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5fc6b8608723a.pdf
    • https://cdn-cms.f-static.net/uploads/4414487/normal_5fe756056ff03.pdf
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/rovup.pdf
    • https://cdn-cms.f-static.net/uploads/4495973/normal_6041bb1d37116.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a09054a-9689-4cb7-8877-474a9fe3d01f/does_damon_salvatore_die_in_season_5.pdf
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_a79717f78f1c40e4a8db881d8542135e.pdf?index=true
    • http://zisukuvi.atwebpages.com/lasejavimoputasi.pdf
    • https://uploads.strikinglycdn.com/files/7a0366cb-81a4-494d-af3f-a3b3bf76445a/tafabikigizujusosafuxetu.pdf
    • https://uploads.strikinglycdn.com/files/2bb468b1-5139-4096-8b6a-ebc2bb59a8b4/41038247597.pdf
    • https://uploads.strikinglycdn.com/files/fd65fbdc-80a9-4652-815b-467aa9cf256a/wajaf.pdf
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_059d4eb71bd54aafa8eee7f33ae00513.pdf?index=true
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_7afc68d72456447f9dbb10cf3d74d797.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8d585f15-d785-4e95-b8e9-02ef3582c285/xajobigodobenugukeje.pdf
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_b9a2e75489814611ae946f7c19ab0641.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ec.bin
8660d6e43b8ee646c3318966901e9541d9cb0336ef41799a2b799858f0834c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 5588 bytes
font_01_sfnt_off000109ce.bin
ee5dc034f4f747732e193ff28a54e0d2b8fb635dfc1cbc3cf0def7bd910a73e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 10168 bytes

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