Malicious PDF — malware analysis report

Static analysis result for SHA-256 5528248f8d7399a1…

MALICIOUS

PDF

69.6 KB Created: 2020-11-27 01:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b4f7550431d2830c78d637ff871c7dc SHA-1: d45f025f47a8a5bccadce331128762ee3e7a2886 SHA-256: 5528248f8d7399a1fa7a8718091a6570a695c5f68ec32433c82b3e8aec19a7ac
156 Risk Score

Malware Insights

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

The PDF contains a lure related to 'win tickets to one direction reunion' and embeds numerous external links, many pointing to Weebly and other hosting services. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=win+tickets+to+one+direction+reunion
    • https://woronawupewusor.weebly.com/uploads/1/3/4/6/134672267/b6a57de1e5.pdf
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5fb8825f19422.pdf
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f998faf55862.pdf
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8ce7d3d412a.pdf
    • https://gunewobeje.weebly.com/uploads/1/3/4/1/134109175/jozerumumugeve.pdf
    • https://cdn-cms.f-static.net/uploads/4495846/normal_5fbbc11ef25cc.pdf
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5f93882938524.pdf
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5fa00072d732d.pdf
    • https://cdn-cms.f-static.net/uploads/4476432/normal_5fa906e24f66b.pdf
    • https://cdn-cms.f-static.net/uploads/4470020/normal_5fb79ea68df9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3d945bc5-09e5-4846-9022-10d0d3225c24/carita_de_nio_para_colorear.pdf
    • https://s3.amazonaws.com/zedudo/13828419958.pdf
    • https://s3.amazonaws.com/dakebesuvum/driver_booster_para_pc.pdf
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c76f.bin
76cb1eb1566a220d69dc9f4170263b7f2154f800f22a9c0143d046bbce7a9394
pdf-font-stream PDF embedded font (sfnt) at offset 0xC76F 4768 bytes
font_01_sfnt_off0000d7c5.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 3720 bytes
font_02_sfnt_off0000e328.bin
d0682304ee9c773ab7491b43168f8f6aa258f3a72af38a69841e29de07c34e89
pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 11220 bytes