Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0f74ad2300c733…

MALICIOUS

PDF

69.2 KB Created: 2020-11-23 00:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e9a155195c7172e9dbabe66ba9d61bf5 SHA-1: 86808029a6cee9ef34a0a9ecf5cc466c74e5abbd SHA-256: 5b0f74ad2300c7337765afd3a7fccd28afb183915be5886b340207712653fb30
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, appears to be a search result for 'happy birthday wallpaper for girlfriend', likely a lure to disguise malicious activity. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or redirection attempt.

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://trafftec.ru/wb?keyword=happy%20birthday%20wallpaper%20for%20girlfriend PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5fa3776d9be7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5fbae6b7247cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff783524-5c46-4ac5-a510-608ac322a6f0/zezesopimojoxawujidi.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/jixosoradasopiwude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf464dc-15dd-4a91-a5ed-cfc01bb7e209/grandmas_boy_putlocker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf6c97f-8b86-4041-8d19-ea4be91f48b3/lg_8000_btu_portable_air_conditioner_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7253ae1-135a-48bb-a997-c5bbc81837fd/breath_of_fire_official_complete_wor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdb74cb-97dc-49b9-bc82-4bca14da3c9c/5_conceptos_de_economia_con_sus_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd79b1c-abf9-4a59-ba34-15c5604cca94/71805959446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa7a9b7-fb9c-4e1a-aaa6-d77f27fa3cb0/75100407043.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/example_of_a_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcf59dc-0b03-4a1b-ac1a-4540d9c5a9b9/lovefowujoxedizo.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/aiims_2020_syllabus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6451faf7-b953-438e-938b-0eea8d8cb71c/43650501283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b88530-0d1c-47bc-b1db-d7cdb4caf847/sketchup_2015_free_download_with_cra.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_off0000d04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 5420 bytes
SHA-256: d466b4a73acfe7395b498f51e6674c783c388308ee2654f58fe3de81cf76f65d
font_01_sfnt_off0000e2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 10824 bytes
SHA-256: 0da1c52eab349ee39f550505b1357610ad331ea7630d998065207352b6ffd5ac

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