Malicious PDF — malware analysis report

Static analysis result for SHA-256 630fe519398d0205…

MALICIOUS

PDF

74.1 KB Created: 2021-04-01 18:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b0651db424836e44d10bd3d9c50041ac SHA-1: 89468d4ffe9216023ac65b8f95fbdbba65768946 SHA-256: 630fe519398d0205e172472fd9e64d71e3031be9e151e56761a50a42b4755200
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to a suspicious domain, 'kuzutuzo.ru', which is likely used for phishing or to serve a malicious payload. The document body, though heavily obfuscated, suggests a lure related to a 'Niv life application study bible'. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=niv+life+application+study+bible+third+edition+bonded+leather+navy PDF link annotation
    • http://komaxinatobofe.medianewsonline.com/how_google_maps_timeline_work.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_60160ee7be153.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/frosty_the_snowman_original_song_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480897/normal_605cadac3bf4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/step_by_step_ascended_master_discourses.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/38032783723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f9076c-1da6-4a71-8e7c-bbfeccb493a4/how_to_set_stopwatch_in_fastrack_reflex_2.0.pdfIn PDF document text
    • http://diruben.rf.gd/zulenogikewavebenevu.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/introduction_to_auditing_lecture_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f455e3-b72b-426b-8468-8e3f8e86093e/rilozalewunajonupikupepan.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/sefolip.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/kavetudefakowedapupez.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/vidmate_app_in_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b0e180-4a2f-4da3-980c-2b405c7fb411/how_much_does_rent_increase_going_month_to_month.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/bogiragegane.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_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 5516 bytes
SHA-256: f96c6990d907e41950b6b6d77af5af703124e7b9dadc8a80c0698199b391a9c3
font_01_sfnt_off0000f3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 11708 bytes
SHA-256: 6987a5629f667b11fed21c29dc34b7630ab119881b4826270438f1f5b069e8b2

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