Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d54edf455b458ba…

MALICIOUS

PDF

52.1 KB Created: 2020-11-08 04:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1e91ce38d9b3d21de3498f549b1faa71 SHA-1: 087c569bdc346551a52c4a148eb3f6ec35c93419 SHA-256: 6d54edf455b458bab6936a68f866d698ff4ea801e4e0ec14413ef8227c3c1f85
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/aws?keyword=list+of+phineas+and+ferb+episodes+wikipedia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f9d4e6776ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_5fa4bf42611b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dilopipo.files.wordpress.com/2020/11/demetivudaxakoleze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103694cc-3328-499b-9234-ad6b834fc4bf/operaciones_matematicas_sexto_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ece9b2d-930d-47c4-aa8c-a81c19a1fd1d/pawoxoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4744aa8-8fb1-4821-aea3-22755796e85c/xinikekuxobexuwizigodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1519356-9674-4151-b2e7-c92c712f12e5/56376254787.pdfIn PDF document text
    • https://xexobosekewa.files.wordpress.com/2020/11/4725846619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc6e66e-57de-4c3c-95c4-d69ab2bb5da4/barrons_sat_practice_test.pdfIn PDF document text
    • https://bagiwes.files.wordpress.com/2020/11/jezax.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/42753163975.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cbse_6th_class_maths_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/illusion_spells_skyrim_invisibility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5308b09-bad7-4fad-892c-576dda866481/umcor_layette_kit_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/jolewijofazigika.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_off00008cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFC 5336 bytes
SHA-256: 3a7bb9fdb8e18130dfa7593fdc30641b90d7cdf26a46c1e0276f3ac940bd0106
font_01_sfnt_off00009f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2D 10704 bytes
SHA-256: d7aa78988cf22d74fb66489788282eabb01929918df074456e7fa378006dff65

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