Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb87a6ceb8f272f…

MALICIOUS

PDF

90.1 KB Created: 2021-03-08 23:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08ca49f1b4b57c5bcfdc0db626621d44 SHA-1: d340be31072e44c48dec033a541bfd9530dee0b5 SHA-256: 9bb87a6ceb8f272f09033a8861ebd47faf2e82baa78178de90da537df4ba5862
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious. The ML classifier also strongly flagged this PDF. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/wix?keyword=warrior+cats+vision+of+shadows
    • https://static.s123-cdn-static.com/uploads/4454425/normal_5fcb79d549e13.pdf
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5fdafedf12f6a.pdf
    • https://cdn.sqhk.co/xenivoronizu/igruKjc/26263871675.pdf
    • http://jixewelo.scienceontheweb.net/hp_laserjet_p2055_data_sheet.pdf
    • http://itdomen.fun/ncees_reference_letterwd7zm.pdf
    • http://helplnstagramoffice.com/benin_country_informationq44mm.pdf
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5fe76cf31b56d.pdf
    • http://ontrade.top/university_of_texas_zip_code_austinf9pkh.pdf
    • https://cdn-cms.f-static.net/uploads/4481055/normal_5fd8255209f83.pdf
    • http://tesocoin.online/how_to_write_a_paper_for_college_class4b0ug.pdf
    • http://budokudepa.scienceontheweb.net/jumuxinarovupufobobed.pdf
    • http://jipetabonitu.mywebcommunity.org/death_of_a_salesman_biff_quotes_about_willy.pdf
    • http://onlinetiser.website/6808507018606hzo.pdf
    • https://cdn.sqhk.co/taxeseta/OIChcYO/lebawomozejunevozufam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_1f32f014f2ff47e09bef4cb41411b14b.pdf?index=true
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_44d3f5bf0e6b43e7810f1c2fba8ee24b.pdf?index=true
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_eed84602d5154257b902fdb811e2e562.pdf?index=true
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_78b2e1c94dc2479cae66d5e69a201845.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_off00012193.bin
9df09cfe4e43575ffa8018a0b29a9cdeeee94fadb68544f4a21b02c9e5aaf9e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12193 5240 bytes
font_01_sfnt_off0001337b.bin
b97d76c0627b1423f01169f4e74c53925e55a50bfed7d7ba8f271434cda0bc55
pdf-font-stream PDF embedded font (sfnt) at offset 0x1337B 11520 bytes