Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad83920f359d7aef…

MALICIOUS

PDF

91.5 KB Created: 2021-04-01 03:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77942a216ffa146f4bd667f838214fbc SHA-1: d9b5b91340629bc7352094826a0f001c63140b67 SHA-256: ad83920f359d7aef3928a9d554856e6f81a14e3d4e707c2c6dca93405c575835
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=honeywell+rth7400d1008+installation+manual PDF link annotation
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/8433980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_6019b4c9efc95.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/polymers_class_12_cbse_notes.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/ae3ff6fa12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_605fa05730c18.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/why_does_my_samsung_tv_not_stay_connected_to_wifi.pdfIn PDF document text
    • https://wivilunox.weebly.com/uploads/1/3/1/4/131453894/pajedigopibenar_narofasolivavo_mogegoburuwax.pdfIn PDF document text
    • https://mexilaret.weebly.com/uploads/1/3/0/7/130775974/ruxejo.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/b._sc_maths_solution.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugexumelelada.rf.gd/32700346431.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/latest_hollywood_action_movies_2018_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbdc5bb-a94f-4997-9c4a-d0b4ef0ef127/25029799084.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/indian_air_force_information_in_marathi_wikipedia.pdfIn PDF document text
    • http://xadeboni.epizy.com/ireport_plugin_netbeans_8._2.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/investor_guide_to_fidelity_funds.pdfIn PDF document text
    • http://wulesubutufazaw.epizy.com/fodebikuwisosiziwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/f_scott_fitzgerald_the_beautiful_and_damned_review.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/serevuxemaxise.pdfIn PDF document text
    • http://pabudixobo.epizy.com/linkedin_jobs_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/rizadukolezirog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfceb0f1-c83a-4318-9106-5121c93b3f55/bruce_lees_fighting_method_portugues.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_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 5776 bytes
SHA-256: c7beb18db9b4536e4aa5a5094a06cee85c6d98d6fc8dda632caa0cc6e5f32988
font_01_sfnt_off00013891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13891 12244 bytes
SHA-256: 45636735b909b92a8f84c39b6dbe4109577f7605c341c7fbfe499614a0606196

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