Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1929167e0245bde…

MALICIOUS

PDF

82.1 KB Created: 2021-03-17 05:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e1a23b445a0635f8785d7e7156fafe SHA-1: 66d64ba75f5a8e531378eef5c0490207e7693051 SHA-256: c1929167e0245bde793feb7c73d7257127470e1880e453e3c4d8cde8e0db3401
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to be a lure related to educational topics, likely intended to trick users into visiting the malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=what+is+the+role+of+a+co+teacher+in+education
    • https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/gazimutus.pdf
    • http://numberoone.xyz/traditional_african_drum_beat_mp3_download9b0cn.pdf
    • http://granitmetrospecstroy.ru/how_to_fix_water_heater_backdrafting0j793.pdf
    • https://cdn-cms.f-static.net/uploads/4461770/normal_602edff964934.pdf
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fde4924ef678.pdf
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fc5e8e623e22.pdf
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/157039.pdf
    • https://static.s123-cdn-static.com/uploads/4379370/normal_5fcd70f64a4f4.pdf
    • https://kaxemesotom.weebly.com/uploads/1/3/4/7/134732336/6019983.pdf
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5fffefa13ab3d.pdf
    • http://getcreditcheck.info/manual_de_utilizare_ariston_hotpoint_wmsd_723rfws7.pdf
    • http://coupons2020.info/devawizavawetal8kfl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xugigabitulu/circular_motion_in_sinhala.pdf
    • http://tuparibuju.atwebpages.com/boruxafafoxitaxisawavuva.pdf
    • https://s3.amazonaws.com/gulapore/what_to_order_at_dunkin_donuts_on_weight_watchers.pdf
    • https://s3.amazonaws.com/zesotat/international_credential_evaluation_report_university_of_florida.pdf
    • https://s3.amazonaws.com/figugipopar/lijewoposemav.pdf
    • https://s3.amazonaws.com/kaxukok/48768989009.pdf
    • http://gekolutewubel.myartsonline.com/what_is_cross_cultural_tolerance.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104d8.bin
53b38d67a4cd70b6720cf85039ff6ada113dfc4af3f7cdc2505bee1f501c414f
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 5124 bytes
font_01_sfnt_off0001164a.bin
503588ee10eebbdb488f9e9999a29c4b8285afaa23bb197bcc03f4883a7691b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 10852 bytes