Malicious PDF — malware analysis report

Static analysis result for SHA-256 29833248d80d1011…

MALICIOUS

PDF

79.9 KB Created: 2021-04-29 04:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7b7f1935346adb5bdddfcbaaac56f20f SHA-1: de06ace1f16e0b9139d40b59cb195fc4fc9d14d2 SHA-256: 29833248d80d101120c8369aaf85fe7621dea522fdf3bbff17877492f6adff85
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'clinical pharmacology of miami', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=clinical+pharmacology+of+miami PDF link annotation
    • https://cdn.sqhk.co/jozanafe/9Zgjaii/38955212510.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/fibupunekidomekabixuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5ffa893211314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491159/normal_5fe3e3953b8f4.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/astronomical_almanac_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuloka/NWHKXia/pixel_unknown_battle_royale_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/IrC2jjT/xomemor.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/ahiVHhh/tojow.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/digFjbs/java_jdk_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/gIiijgh/pavebo.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/banksy_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/eab39b80-102b-41cc-bfad-05080fe322f3/97692731048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fc2aac-d00d-4b39-9e47-8d8b4678d361/tumelaxupigovavapasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336b1bc6-7b03-409d-b215-3d7d675d04d2/42944330250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4181bc48-06dd-45e1-bfc6-817f06104ced/wendell_berry_the_unsettling_of_america_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c91b3b8-ef7f-4446-8101-b7275d15af99/toshiba_regza_55_inch_tv_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38c14d4-8a75-4356-83d3-f592cace0d80/mvc_tutorial_c_visual_studio_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578f8922-9d32-41e2-bb7e-ed0de643ba6f/mavekujadapis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 4968 bytes
SHA-256: 31aaacf6fb2151789ac6c437a354900b12afa3e0ca485524f4e3247a8faf1e8e
font_01_sfnt_off0000fd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7E 11432 bytes
SHA-256: 516c464a155d1a693d80e8ec5c8e5d14359c4729eec6c7e846cdd0e54741e8c1
font_02_sfnt_off00012484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12484 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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