Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53941c545e7d297…

MALICIOUS

PDF

85.8 KB Created: 2021-03-27 10:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f2d070ddccdafaa16a98d8afc16c50c1 SHA-1: b2135f6dfd594ec00c724ed314bb4043ef53f635 SHA-256: c53941c545e7d29743f0e7bb7158700569c0a6b75e0acd297b895350f4cc5417
104 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and a machine learning classifier. It contains an embedded URI pointing to 'https://baarspo.ru/strik', which is likely a malicious landing page. The document body, though heavily obfuscated, contains heuristic indicators of urgency lures, suggesting a phishing attempt.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=what+does+bonne+chance+mean+in+french PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481418/normal_6049403d4ccdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477649/normal_6032bd0a76767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_601732f53d5a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_600517a87e365.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/2020_calendar_june.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_6034d6a1bffbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_605ac04cac8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_6025fd5dd8372.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/are_amana_washers_reliable.pdfIn PDF document text
    • http://zifeladawu.scienceontheweb.net/34044076465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393900/normal_6049b1da52283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_600a129261086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368218/normal_5fe134ce01ca4.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/gisujubolidine/27005467217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce383e7-f107-4b22-ae81-8c076fb06e38/english_grammar_course_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/sensory_details_taste.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/81023084205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061f4f2a-3c4f-4126-a559-deebda751dfa/spd_sx_special_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/124035f4-7316-4f85-b20a-6182f7eb4797/26226183260.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/english_learning_for_arabic_speakers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 5380 bytes
SHA-256: fc7bd88a8050c18be47ebf65bf58c625a24ce996e22a6ac466c0a3881e780ca6
font_01_sfnt_off00010cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 12312 bytes
SHA-256: b78566c08feddfbbb3dca35c7ef5b55c13a4d0906eeba980821b2314f9b777d3
font_02_sfnt_off00013488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13488 16068 bytes
SHA-256: bff620efafd19347b267d395afbaf496ecd82cd7772b41387cd2beb5a1750540

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