Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde8f81518d3b2fe…

MALICIOUS

PDF

40.8 KB Created: 2020-11-06 11:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 086f19cd1dc6791010ffe026ab090b09 SHA-1: 3ce54a5cc50a57560d2e9adb98be1d42ca03f498 SHA-256: fde8f81518d3b2fe48368d89cac3d714a22c8a8897b823e435a19d5f6d28e3dc
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://traffking.ru/aws?keyword=clifton+strengths+assessment In PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/tivowiposinifisoxos.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/kezemiradigu/op_amp_integrator_circuit.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/lozolejigigefagevoge.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/netball_attacking_drills.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/introduction_to_exponential_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/pc_whatsapp_apk_download_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/balanced_scorecard_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/calculus_and_vectors_12_nelson_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/cambios_psicosociales_en_el_adulto_mayor.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/chinese_bus_schedule_from_schenectady_to_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/powerscore_logic_games_bible_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/pigalunuketu.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/bopovowudevep.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/241071487.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/ge_spectra_xl44_self_cleaning_oven_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/best_self_be_you_only_better_walmart.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_off0000617d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 5084 bytes
SHA-256: 5f7c9a407c7108ceadbdbe5f15e01b3595580a190dc07bce8fabfdce63811e4d
font_01_sfnt_off0000729d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729D 10476 bytes
SHA-256: e9490c0d9542bf4da5d76ad85f40c211cf40b4da6d210230755e501f9d5ca579

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