Malicious PDF — malware analysis report

Static analysis result for SHA-256 b642cd87961488d1…

MALICIOUS

PDF

74.2 KB Created: 2020-12-06 23:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8903f94e6c9156820d0a8ac4a640d788 SHA-1: 60217c8a0bec9b0b6b210e0a9f08451555a42ced SHA-256: b642cd87961488d106b8fc7e17011a63b065bf9a949447693b66e83874802cbe
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 URL pointing to 'trafficel.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to scholarships, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/123?utm_term=scholarships+for+seniors+2020+georgia PDF link annotation
    • 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://static1.squarespace.com/static/5fc566d10b6b03258f537d87/t/5fca7274a08b9342fa99e06f/1607103093204/66947828428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40f939e-d8a4-44ad-b063-5bbd15ca8c6c/34277121671.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65a04ab79f442f24ead5b/t/5fc9194ab8ea7d48c59fdba8/1607014732210/design_your_dream_room_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e6747b-4d12-4360-839a-ddcb688a7bc8/tuwipumewudepilegebobizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9404c87-e2a4-4e6a-bb78-00175ff6bd11/17838730491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da354c54-41ea-4520-8405-de8e2e83e553/chasing_past_dying_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3f1aed-c724-41f5-a97d-3c931bae5f25/44895905983.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/coraje_el_perro_cobarde_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27808973-eed9-4af5-a16d-f301264744b1/girl_with_the_pearl_earring_painting.pdfIn PDF document text
    • https://s3.amazonaws.com/dirijazi/american_third_grade_age.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

Related samples 2

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_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 5364 bytes
SHA-256: 04c98e57a6a3c09ddca4816c6453176a6c1d6770c3d7f7c0feb7866f349aa4e9
font_01_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 10988 bytes
SHA-256: 0c3b25b6965abe781d9b7de14415072ef4c3ae270344021c1f1c8d3fdf248d93
font_02_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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