Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b4b1d696edfb64…

MALICIOUS

PDF

73.9 KB Created: 2021-03-19 23:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 76b2ec96f2dd3dbcb8de601c8bb40578 SHA-1: b19aaa74be9eb32a866150d8ea9bcdf14f34e9e0 SHA-256: f7b4b1d696edfb646bcacd0a30d74dc7dececd32fb1110c1f53332dfa38d8091
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=how+to+put+calculator+in+degree+mode+casio+fx-991ex PDF link annotation
    • http://timecodes.net/404830804135hg61.pdfIn PDF document text
    • http://verification-help.com/rekiduvntx.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/nunutulixowut.pdfIn PDF document text
    • http://rent-nout.site/17574718034zvusd.pdfIn PDF document text
    • http://bonboxstudio.com/kuwidepofirerugslqvl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bojafazes/lafixebawo.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/tennis_stringers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/formal_email_example_job_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1af328-5416-4ca5-8985-186f9247f7c6/19829897110.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/manogogisisatanemosurima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eff17c4-fd8f-4a6f-9fb2-d50e9b18af28/bigudakaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/tazinixuwowugupanixokat.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/kumon_answer_book_level_d.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/metadafirozerutula.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/14495262821.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/10084986481.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/emily_post_etiquette_1922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e488e75-c382-4826-8db4-2fb9720ef973/atlantic_fleet_free_download_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/futesegewisoxuwusogosoz.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/divagonebikigidirilobag.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/trigonometric_identities_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/denapajonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d957394-2d8b-412b-b87d-19edb7d0377c/best_zane_grey_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/9919796181.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/75000675184.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_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 5836 bytes
SHA-256: e1d6c0b09ea102e0e5f643f415fe73ea7cdc629d7684262069d7d72070f31488
font_01_sfnt_off0000f3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A3 11160 bytes
SHA-256: 58c0696feeb183f648839f31f8b2098e2fa829eb45d995f6428254f469f160d3

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