Malicious PDF — malware analysis report

Static analysis result for SHA-256 470fa1d738ae48e1…

MALICIOUS

PDF

40.8 KB Created: 2020-10-31 13:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ee714f02fd15f6d3ae553b967ea14dd8 SHA-1: ea04ba3efb8311f069a1d560cac38a49941e5fc0 SHA-256: 470fa1d738ae48e19aa7e8786542698206afefd4a7033c7886536facfea92676
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/123?keyword=marsha+linehan+books+pdf In PDF document text
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/5603849.pdfIn PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/pexixuzazisilo.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/3a9a8.pdfIn PDF document text
    • https://sudateneturoxa.weebly.com/uploads/1/3/4/3/134322726/2c162.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/kanizol.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/1/0432/1961/5904/files/recover_deleted_videos_android_without_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/go_launcher_prime_apk_free_download_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/download_king_root_apk_4.4.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1566/7353/files/kasibekipox.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/judd_et_al_plant_systematics.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/51929662918.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/prentice_hall_science_explorer_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/minecraft_education_edition_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e9900d-b29c-491d-97e6-4ed00b408ce4/danganronpa_v3_chapter_3_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c8aafb-f97f-43b8-a18e-92d59fc22c8f/lovazetoxu.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_off00005ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC0 5340 bytes
SHA-256: f47edd5d03fbb71665da6af7592e75b8a9ddb62ecbd10c173895343084b89745
font_01_sfnt_off000070e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 11316 bytes
SHA-256: fea84287e2bcbb786ae5a96c5c58381b94e08ad7950c1859ef9f302c50a53106

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