Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4652639c9903f5…

MALICIOUS

PDF

70.0 KB Created: 2021-03-15 04:38:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 938e2b9320e3e4e06ac57e37c882cc5b SHA-1: ef953e2cd50b94f2894bd938e35372533f36aede SHA-256: 5e4652639c9903f5b2f4ccaaa12b610ccff242a5dbae9f38683b8a996af0b667
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs that mimic search results for academic materials, likely to trick users into downloading malicious content. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The presence of external URIs suggests the document is designed to redirect users to potentially harmful sites.

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/wix?keyword=fundamentals+of+physics+halliday+resnick+walker+8th+edition+solutions+pdf
    • http://gukolifuk.iblogger.org/92312289384.pdf
    • https://pemejugaxopuled.weebly.com/uploads/1/3/4/7/134749032/zibev.pdf
    • https://cdn-cms.f-static.net/uploads/4414500/normal_6043ec75579d7.pdf
    • https://cdn-cms.f-static.net/uploads/4455403/normal_604ebbde2897f.pdf
    • http://jolijivik.scienceontheweb.net/livabo.pdf
    • https://zojezuma.weebly.com/uploads/1/3/1/3/131382028/6530945.pdf
    • https://cdn-cms.f-static.net/uploads/4453326/normal_5fe801f56f48c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xijevilofut.rf.gd/health_and_safety_coordinator_salary_ontario.pdf
    • https://s3.amazonaws.com/nigimul/counter_strike_source_old_version_free.pdf
    • https://uploads.strikinglycdn.com/files/92189e82-ef97-4dbd-b48c-1254709cc247/mckinsey_global_media_report_2019.pdf
    • https://uploads.strikinglycdn.com/files/8711c4ec-26a1-41d9-bcdb-5f11687b026b/nomisuperew.pdf
    • http://fegelefuxenitud.rf.gd/60476182155.pdf
    • https://uploads.strikinglycdn.com/files/ddcb72b2-bb88-4aa2-9498-19f9d5cfebea/logunepibawuxexawigul.pdf
    • https://uploads.strikinglycdn.com/files/41970afe-b17b-4cd5-b67f-1ec70dbf4951/fifty_shades_of_grey_full_movie_dual_audio_300mb_download.pdf
    • http://tojederetesez.epizy.com/media_player_classic_free_for_windows.pdf
    • http://vimixof.onlinewebshop.net/arbeitsvertrag_vorlage_kostenlos.pdf
    • https://s3.amazonaws.com/gomaxod/96224551025.pdf
    • https://s3.amazonaws.com/tabobujimo/bakubugojikumarazelezejek.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_off0000d395.bin
e391b52d2275822853b09defe6e9e4777c444e5ffbf5b682677f9c1771798211
pdf-font-stream PDF embedded font (sfnt) at offset 0xD395 5804 bytes
font_01_sfnt_off0000e74d.bin
3dcb4d61003aee148637a2f1f99d7cb818f99a1a6c25fc1935736ee1086adaa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 10292 bytes