Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ab948974ceff3f…

MALICIOUS

PDF

72.2 KB Created: 2021-02-14 12:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f1a51d7e7bd1efb6a77986435965a2ac SHA-1: ba7fe6943591af4f238f04cb16970505d539f8bc SHA-256: 36ab948974ceff3f40307d8dee73159f5e77c267be349dc6b13aaac1f244cec6
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=cesar+chavez+mini+q+answer+key PDF link annotation
    • https://cdn.sqhk.co/gokovolasula/5jagggd/75514566368.pdfIn PDF document text
    • http://aviabileti.ru/duwajak6gm01.pdfIn PDF document text
    • http://gvidilon.ru/6._03_calorimetry_lab_report_answersjmmnv.pdfIn PDF document text
    • http://faketikus.22web.org/assassination_of_franz_ferdinand_worksheet.pdfIn PDF document text
    • http://sizegivip.22web.org/xusimifo.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/kavugusepe/organizational_chart_html_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/88616922474.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/xifisa.pdfIn PDF document text
    • http://dulubuli.rf.gd/fevorafafanifu.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/arena_chess_for_windows_10.pdfIn PDF document text
    • http://riwexakax.epizy.com/iphone_app_store_apk_2018.pdfIn PDF document text
    • http://likasiz.epizy.com/rajesh_cherthala_flute_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/16799139925.pdfIn PDF document text
    • http://lebozid.epizy.com/rubonifekufijepizeres.pdfIn PDF document text
    • http://xenupodaxamutev.rf.gd/bach_cello_suite_no._1_sheet_music.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_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 5404 bytes
SHA-256: e48eaf71793bf92d9d7886f911d1567b196dc2548660839d1d82e23d8adc5411
font_01_sfnt_off0000efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 10768 bytes
SHA-256: 91eeaa1c4d5baefb52229da1e987a554bbdab4ae5c04592f6979a7c05ebf0750