Malicious PDF — malware analysis report

Static analysis result for SHA-256 9764844b46bcbe97…

MALICIOUS

PDF

40.9 KB Created: 2020-11-03 22:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0220647b62e3e0a7c540ff3476125f6a SHA-1: e549eaa681f0b950ea87b6d3b96af128312e36de SHA-256: 9764844b46bcbe9791b34436169e0ab39c5ac4c5135d040307098f06ff027216
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://ggtraff.ru/123?keyword=secret+benefits+ts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_5f95dc470e1e7.pdfIn PDF document text
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/jugusinunaxatoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5f9b839d4367e.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/nisoxow/currency_symbols_list_with_country_name.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/vcenter_web_client_firewall_ports.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/75613564355.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/zoxirilu.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/jetpack_joyride_online_game_free_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/anywho.com_phone_lookup.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/51929662918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefbe8a8-2cf5-43a5-af5d-199e15f47c39/diy_electric_scooter_with_drill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a47864d-8fcc-47bf-9689-91b90947b2f5/superman_vs_batman_full_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/61131867305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afa8996-f611-4939-bdf5-d4ae5f58cd88/69357186512.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/download_bukhari_sharif_in_urdu.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_off000064bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 4876 bytes
SHA-256: bc5f807f177ae7baefdc631b87f2115277ad9820a6da0f1d70a1c989509bd27f
font_01_sfnt_off00007569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 9952 bytes
SHA-256: 5793f3f9d4fb5d83e1125bbb5e4df588fe549aec34705146164f2f570dc8be1b

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