Malicious PDF — malware analysis report

Static analysis result for SHA-256 806a899a117eb4f5…

MALICIOUS

PDF

44.8 KB Created: 2020-11-02 11:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ce5de3f895b51b502abd272757c94917 SHA-1: 488ec006de30704c583f1291fd2a520dbf7403e6 SHA-256: 806a899a117eb4f5e497e47e68bf1d7cd24de8864f0f90f490c3d8b323af9218
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://cctraff.ru/strik?keyword=unblocked+games+66+ace+gangster In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/zofej_vuwolu.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/vobobisasojiki-suked-timenisibax.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/luzojupupalo_pozux_gusukuforegof_tizuwamap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5f968d186a185.pdfIn PDF document text
    • https://xoniwolujejusun.weebly.com/uploads/1/3/4/4/134456196/zejutakemeforat_wevimesokojub_gadapuvodiz_beferobixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2953dca4-1afa-431f-a086-9fc388741b8d/49385857416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd94c9b8-d467-436e-9607-1c188d38f121/bisomafavoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/calendario_2019_argentina_feriados.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/91377604643.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/gifs_de_boa_noite.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/origin_of_coca_cola_company.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/after_effects_tutorials_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0ee149-ed5f-4b8f-86f4-d3b5f6a52b5a/bipixapebudodawonexotevug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47db886-6671-4fa5-83d9-a7b3211da007/perforated_paper_for_w2_forms_staples.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_off00006cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC6 5608 bytes
SHA-256: 1d621f49d404401bb210bf4ce4771b65b1accd3acf98b40cea6b18e4d0798501
font_01_sfnt_off00007fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 11712 bytes
SHA-256: 8fee6c56f9b7e64fd0ef4ed5ab47f512603de6356af968b49b2e0828fbfad5c8

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