Malicious PDF — malware analysis report

Static analysis result for SHA-256 381d62bbf55021ef…

MALICIOUS

PDF

48.6 KB Created: 2020-10-16 00:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 81803a398971a919282e785e3512015a SHA-1: f77769c8f46428f9f6f23bbcd309ab972cc06d35 SHA-256: 381d62bbf55021efec47736bbd601d381e450ab24aa8c8b77dee63742b5582ce
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/pify?keyword=download+my+boy+gba+emulator+full+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f88bbde7f2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88bbd15ea3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f88bd61c8538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f878412cf83f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f874cc592009.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/vusidosotuzoxe_xudoxav.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/2491377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/jidimodaviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9790/2244/files/ngugi_wa_thiongo_decolonising_the_mind.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6637/9425/files/shipboard_oil_pollution_prevention_emergency_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/dagiwajusunevixutuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0522/3327/files/7843247174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/free_reading_comprehension_worksheets_-_upper_intermediate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/dark_souls_3_boss_guide_in_order.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4646/1336/files/que_es_un_bosquejo_de_temas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8490/1277/files/the_magos_eisenhorn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8247/4163/files/pabeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3821/4810/files/crate_and_barrel_careers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4775/5172/files/apk_animal_crossing_new_horizons_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2484/3420/files/94179275313.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_off00007cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD1 5580 bytes
SHA-256: ace05c339962d53e3ccefcc448c7bd6f345679208e492db269ac0b9914d1ee1f
font_01_sfnt_off00008fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDE 10764 bytes
SHA-256: 55af7cefcfaef938a0837c0b795c6848a3c72fe6479890b1a9386c47f689e9b6

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