Malicious PDF — malware analysis report

Static analysis result for SHA-256 50df0caebd9f832d…

MALICIOUS

PDF

70.6 KB Created: 2021-03-05 17:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 94939ed473765b4ce4b010be5bf17a3c SHA-1: b2217c73316f6c8e21995af37e07097d6847595b SHA-256: 50df0caebd9f832d4019545102ec85822123ce04ec369e3274b53e5aff221250
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/wix?keyword=mt+ayr+schools PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5fe05245f2a70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484156/normal_5fe0ef2f0c778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_5fea129060c8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5ff94233e5169.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/is_blink_charging_stock_a_good_buy.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/24588198979.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/tamobalasu/21517236677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cef3332-ae95-49c2-8095-c78832e37219/what_is_a_risk_level_2_sex_offender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae836893-3e5c-4f60-9086-7a94111d3a90/how_much_does_an_electrical_systems_engineer_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3720eb03-b1b6-43be-800c-685b2d82513e/how_to_connect_to_wifi_on_dell_latitude_d630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede53f3b-a91d-49fc-9978-f0d9770ec58d/ready_new_york_ccls_grade_7_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/barlow_condensed_font_family.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/manual_citroen_c3_diesel_2005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58085227-3dd5-479f-a685-61bb42addbec/the_story_of_actaeon_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/bulovizusibivujidares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cc4cf0-c991-4a98-ab56-7c6a144aac7f/standard_of_excellence_book_2_drums_mallet_percussion.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/3950101239.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_off0000d7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B2 4992 bytes
SHA-256: 3ac93a550473011dfff0cc87eb14f33e3763f53a92a165f5fa0ec9c198af301c
font_01_sfnt_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 10660 bytes
SHA-256: b9cbd0d72a369e682fb30193b2b660ac025d18626f7b0f023b3ee3e96a9cdf30