Malicious PDF — malware analysis report

Static analysis result for SHA-256 2137b2842cf3eb80…

MALICIOUS

PDF

78.8 KB Created: 2021-04-09 07:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: acb3f4b72b7ae4e8b112e82d41bcdb4d SHA-1: 52d644a0eb49f669cd5faf8ac7c20fb8f149bec6 SHA-256: 2137b2842cf3eb80f6dd0ad53b9165f40625ca975bf3354677ff5ab63e31e6bf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating an external URI pointing to a suspicious domain, and the document body, though heavily obfuscated, includes a title related to rosemary. The presence of this external URI, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitated the embedding of a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=que+beneficios+tiene+el+romero PDF link annotation
    • http://lumobumekola.getenjoyment.net/95327443835.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/challenges_facing_african_countries_after_independence.pdfIn PDF document text
    • http://kutalevewomem.22web.org/2895117323.pdfIn PDF document text
    • http://vovevowumusiki.iblogger.org/blow_away_crossword_answer.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/dutuzanob/72506448551.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/maxuwepukanebekorupop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cfcf571-e055-4272-a306-36a785621c83/the_audacity_of_hope_chapter_3_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/bombay_sapphire_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/kazakhstan_news_reporter_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946242e6-9bb9-41dd-b366-5d96020f7b76/phr_sphr_deluxe_study_guide_by_sandra_reed_and_anne_bogardus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d093948-9039-4e64-aa30-ed6157b70a99/58338664450.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/sosogefew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62c1125-1a17-4a18-854d-78dbf7ef22c1/xorojiraxozuv.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/livre_pour_apprendre_l_arabe.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/11691582652.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/used_cheerleading_uniforms_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da287479-b6e8-4df7-a695-c6391e2b936e/how_to_clean_maytag_bravos_xl_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/22996854894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b4bbd3-e50d-41ef-808d-ec543e81f58c/31113948343.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/11646427456.pdfIn PDF document text
    • http://babijegogaluz.epizy.com/barefoot_in_the_park_play_script_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67776add-0de0-4fe6-83d0-6fbe725e3650/94353431515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c915c750-7bb6-41ab-a923-67404d13c7ca/80183368589.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_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 5016 bytes
SHA-256: a73de9da08d9c04de00fadd226417c982dcad940d92ef7771c580873d2adf453
font_01_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 11680 bytes
SHA-256: d32865e6d842d10ea8a04174138566d5729fa93c4f3d6e84c200fbf4e44e724b

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