Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d1bf6703b22200…

MALICIOUS

PDF

77.5 KB Created: 2021-04-03 19:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb52b06613740f8cf149f3c44b7963e3 SHA-1: 3a49787b9530ab1fa68f0901af6eb3758e68131a SHA-256: 84d1bf6703b22200b90707d676e1c0df937d84f317ccaefac939dc1c2d2b5ca6
96 Risk Score

Malware Insights

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

The PDF document contains a URL disguised as a search result, likely intended to trick the user into visiting a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=how+do+i+become+a+health+and+safety+engineer
    • http://vezapom.iblogger.org/latest_tamil_melody_audio_songs_free.pdf
    • http://blancop.xyz/49137404441rm8wr.pdf
    • http://ejqy.com/vitobefak70ea3.pdf
    • http://kofupum.mygamesonline.org/adherence_definition.pdf
    • http://sujabupinoda.scienceontheweb.net/bose_universal_remote_manual.pdf
    • http://myirn.icu/call_of_cthulhu_rpg_rulebook6i749.pdf
    • http://komunomaled.iblogger.org/periodontal_disease_and_diabetes.pdf
    • http://liberum.sportsontheweb.net/94949764220.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lusabifef/cisco_jabber_user_guide_12._6.pdf
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_1f61433880ff4e5b86f9d5d080c78470.pdf?index=true
    • http://tiwadelir.rf.gd/fedoxazabovuf.pdf
    • https://uploads.strikinglycdn.com/files/7289d9be-23de-48db-911a-eea71f9ce404/how_to_install_dsc_alarm_system.pdf
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_0aeb54c9d76c4b3091c6bc84e198283d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dad25a9c-d18c-43e9-a9b0-804a7f5c2aeb/rukugenirijenuxawukejad.pdf
    • https://uploads.strikinglycdn.com/files/56114a9b-74c3-429c-b379-0987f92612cd/beloved_audiobook_free_download_reddit.pdf
    • http://febefijawifuja.rf.gd/lixetox.pdf
    • https://uploads.strikinglycdn.com/files/8a9fe621-c547-42ea-a6c9-4c8947af7f74/fantasy_should_i_start.pdf
    • https://db22a0a0-c6c8-4eb9-9878-037c50d93224.filesusr.com/ugd/e2b5b3_4ff3fb797afc42cead490db35ebd526b.pdf?index=true
    • https://s3.amazonaws.com/kovibu/what_is_the_best_weight_loss_meal_program.pdf
    • http://zewuref.rf.gd/how_to_report_imputed_interest_expense.pdf
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_fd73104f292b4e6fbef35c8a2d6e3f9d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15b.bin
89199d0c452205a59c3893a7b758a19426ccb8f0137a8042701474a44f3ad447		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 5516 bytes
font_01_sfnt_off0000f404.bin
f8f785fc2af801d46321e93169669b649a4691d96c3e9b25730af4509b5691b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 11120 bytes
font_02_sfnt_off00011a32.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A32 4324 bytes

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