Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9a8eee169089e3…

MALICIOUS

PDF

84.6 KB Created: 2021-05-08 10:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c953dc9f71653630e7dd45f38388d510 SHA-1: 1da4c5ae6723d0e21f0fb0665aa95406f7f57fec SHA-256: 9c9a8eee169089e31bb1bd65eae9145583ad5efc97d9ed8f0856c6f40bb9c204
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://zajinet.ru/strik?utm_term=league+of+legends+patch+10.11+release+date PDF link annotation
    • https://cdn.sqhk.co/tanusulirava/u1Limjc/godville.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/6tge1jg/jorimomububusenojagojeri.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/hcgeheH/wildcraft_animal_sim_online_3d_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/vhhij15/hd_camera_ps5.pdfIn PDF document text
    • https://didekupava.weebly.com/uploads/1/3/1/1/131163833/gupasipofukopusitu.pdfIn PDF document text
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/9344169.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/jh1jI7x/clash_of_clans_pc_hack_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/watajive/dagelerukur.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/robotizukaximaropefaluvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3478582-02fc-489e-ae71-2b365843bd81/p226_tacops_vs_mk25.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/cuales_son_los_5_sentidos_del_cuerpo_humano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af26cf1a-d4cf-4f1d-9305-d7aab12c3b8f/8086446440.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/welixonegujipu.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/1988318145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9fd722-0bfd-4e7d-962a-63c3f73cabad/6850343118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f365c3-69fb-4340-9b91-16f96a03c85c/17276050085.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 5416 bytes
SHA-256: 43cf904b22952b10690b4981710e9fdc520c4db2d40dcb785c8b44f3f1e603a3
font_02_sfnt_off00010f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F65 11012 bytes
SHA-256: 52983aa09e5179ce95f60361432faaf9b92cfcaddc59b9588968e7a86a9564e9
font_03_sfnt_off000134a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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