Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62c2f51007bb4d3…

MALICIOUS

PDF

73.7 KB Created: 2021-04-18 02:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1e71ec5e102a38e88bb6bff4511e6335 SHA-1: 69135eadb396360c2303362c1f50521ea9ef7215 SHA-256: b62c2f51007bb4d3996e29f71c564bcdc10412c2be81333cba161d9d90b22f7a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to "Top 10 bible studies 2020" to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=top+10+bible+studies+2020 PDF link annotation
    • https://cdn.sqhk.co/jepogedofuz/3Tjbhh8/precious_metal_prices_graph.pdfIn PDF document text
    • http://gunaborekigefu.22web.org/kebixibuvebel.pdfIn PDF document text
    • http://kemewizifed.iblogger.org/pomodoro_technique.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_6006a12a00b76.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/gdMDaa2/68688022869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6056f92bc73df.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/vukujidor/77873792245.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/mechanism_of_action_of_acetylcholine.pdfIn PDF document text
    • http://jokolonu.rf.gd/statistical_process_control_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/understanding_statistics_in_the_behavioral_sciences_9th_edition.pdfIn PDF document text
    • http://sirovorisolilu.rf.gd/53505148637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88047875-0132-4060-b82b-c4e5bc9f761f/how_to_virtual_run.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf22b573-128e-43d2-9a6e-20c8d11674ad/how_to_clean_masterbuilt_electric_smoker_after_use.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/70599987197.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/bsf_questions_and_answers_genesis_lesson_13_day_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373f9854-1cfc-4f1d-95b4-f37dd41e5bf5/who_is_darwin_and_what_did_he_do.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/93601201032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2eebf8-f1c2-4f6b-9b81-67c228b711d5/88211419064.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/72369272952.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/rowamiridabo.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_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5064 bytes
SHA-256: 888cf8a11bc6f9bc52b085b69c070a9408d419ef024e1f622f8c0ca854b861ee
font_01_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 11148 bytes
SHA-256: 98921f289b9143f6fc7614476848b795e38705b03c623d3e5d2e9d24be1034a1

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