Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9a7b71e25b130c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 14:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd90e02749c250b74e0b8fbcc922476 SHA-1: 7b3f5aeb9385541073193d605172e30be20b0afe SHA-256: bb9a7b71e25b130ce618718d59c20366471bc9e20445e988f0639c9b3618741c
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that directs to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The embedded URL likely serves as a lure to a phishing or malware distribution site.

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://dafemum.ru/strik?utm_term=linksys+ac1200+boost+ex+wifi+range+extender
    • https://cdn.sqhk.co/poxofufiko/hbhfjc5/fabfitfun_winter_2020_spoilers_customization_2.pdf
    • http://nunesop.scienceontheweb.net/venejowodewapibazimazikif.pdf
    • https://static.s123-cdn-static.com/uploads/4367301/normal_5ffd4f06107c5.pdf
    • https://cdn.sqhk.co/zomuzesirira/jbQvgfp/58105219949.pdf
    • https://cdn-cms.f-static.net/uploads/4367631/normal_601f1c48411b6.pdf
    • http://nikibolerobika.getenjoyment.net/luwaxebe.pdf
    • https://static.s123-cdn-static.com/uploads/4381788/normal_600940221a1bc.pdf
    • http://gazozaxuk.getenjoyment.net/anker_powercore_10000_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ritoma/autocad_studenti_gratis.pdf
    • http://mawokale.myartsonline.com/98987758295.pdf
    • https://s3.amazonaws.com/saziwijaxodav/fovejasurujodewuzi.pdf
    • http://laxukumelukadut.myartsonline.com/76965640415.pdf
    • http://wenares.myartsonline.com/how_to_solve_slope_given_two_points.pdf
    • https://s3.amazonaws.com/pegebunov/sheet_hop_am_giot_buon_khong_ten.pdf
    • https://s3.amazonaws.com/farowug/sopazudewi.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/dajameleparavemiboto.pdf
    • https://s3.amazonaws.com/dejolavubukugeb/adobe_sketch_apk_mod.pdf
    • https://s3.amazonaws.com/dosalapasenow/bubbleupnp_pro_apk_3._2._1.pdf
    • https://s3.amazonaws.com/timituvupame/contemplated_transaction.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c8.bin
a79d71b8599c023a80ee39100fbf4e2e1f7b6555d56bd7a18aa469e02142d8cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 3396 bytes
font_01_sfnt_off0000f3ef.bin
101661ab4a752d551917966ddf60b0950384009caa26efd1dbaaba82b10d3684
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 5888 bytes
font_02_sfnt_off00010834.bin
d56aa29ef0fa42d7d4e8369ca047ffb25ae67249e6562983b2be6a6cabd1aac0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 11276 bytes