Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f198d955a70378c…

MALICIOUS

PDF

71.0 KB Created: 2021-03-03 10:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 018fbd510fb6a4cafdbe46e4ea18db50 SHA-1: fc7471c5c1701c9ce1b6adf41751a762ba741980 SHA-256: 5f198d955a70378cd52fbed740c82f6055698e5fe1cbeebae503f96292a5e62a
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains embedded external URLs and a visual download button, suggesting an attempt to trick the user into downloading a malicious payload. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple external URLs and the phishing detection point to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wb?keyword=what%20is%20a%20regulatory%20compliance%20specialist PDF link annotation
    • http://lamaded.mywebcommunity.org/ziwizojegapijam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_5ff31657284a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454170/normal_6000a2273704c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_6010a27452406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_6018ca8cc8738.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/cojjijz/technic_launcher_minecraft_windows_10.pdfIn PDF document text
    • http://dubiniba.iblogger.org/texakopi.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/nadavo.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/fObifGZ/offline_video_app_download_install.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/iaeNdjh/wallpapers_hd_4k_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufewaruxemo.epizy.com/kao_corporation_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/66763527307.pdfIn PDF document text
    • http://pimorem.epizy.com/facebook_app_for_iphone_5s.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/sumitoguxatekonef.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/gta_online_hangar_business_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/check_your_understanding_answers_geometry.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/bluestacks_4_for_windows_10_filehippo.pdfIn PDF document text
    • http://nepumunu.rf.gd/wingsuit_proximity_flying_game.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 5464 bytes
SHA-256: 1323ac09a152cdef919c4445abdfb098f0c92844435e411a37aca3855bfb9208
font_01_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 10124 bytes
SHA-256: 443e5e8fd5fb1f3b64510f094b15125e96b74bd6abfeac6ac78f8a8d541c7e7a

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