Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30ad1a59f49c964…

MALICIOUS

PDF

52.1 KB Created: 2020-11-02 14:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 487d2c529f74068a6df3bbbae2574c0a SHA-1: d5777cadd113efaf6861cb96fd051fb0fd515c75 SHA-256: a30ad1a59f49c9648b45c873c8b9dfe45624bef8507833815601b6e4737f4a9a
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://ttraff.me/123?keyword=papa+louie+pizza+attack+cool+math In PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/solamebule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f8b6b27a8836.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/919b98.pdfIn PDF document text
    • https://vefozifus.weebly.com/uploads/1/3/4/3/134382693/5652490.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/jazuguboj_rogol.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/1/0504/1461/6752/files/control_systems_engineering_by_nagoor_kani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce7e743-bfe7-4741-a56b-0bc6e877e13a/hallelujah_easy_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cb5bc8-179d-4bc4-ac3b-bd172f733711/mineral_wool_fire_safing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9229ebd-1ec1-4a6f-9f7e-174b8d8cae97/communication_accommodation_theory_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d68322-858b-443b-807e-0c3c74d58c40/first_grade_clipart_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42824541-5bd0-4872-9dd2-43281a518250/73375214028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6e0310-746d-411e-9b2b-95d8b38510e8/12_week_shred_meal_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e286d7-b7b5-4429-8c60-c99c6a788603/33501258064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/8480/4758/files/why_relationships_form.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009c21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9C21 22108 bytes
SHA-256: 4359469b9d34b60c060f3a46542fafe203759508162323b359363c5bfc09b255
font_00_sfnt_off000066b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B9 5016 bytes
SHA-256: 3da9725671cc95af660b9a901231f10381144177294de84f45c18310d34284e2
font_01_sfnt_off000077b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B4 10548 bytes
SHA-256: d247d59d87c2f9c2cc3182cc45c77a1143a02eb302d98be9b42bc0aed786e24b

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