Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e015e449b4e7a99…

MALICIOUS

PDF

37.6 KB Created: 2020-11-07 20:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f4838161aedabdabedcfa589cf75073e SHA-1: 02f622da96666301424d931cbcfbe083f5c3fa68 SHA-256: 2e015e449b4e7a99bc9373eb6583136cf1084f017facc10e112bbc6dfd3d7f4d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=lg+ltcs20220s+reviews PDF link annotation
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/9673884.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/bf1412f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f8ff273263ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5f98be3cc6113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fewunadupop/tajat.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/skyline_ranch_resort_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde44af5-dfe6-463b-bae6-9089d4de2af0/shazam_new_52_reading_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0067a8c5-d13e-41dd-aa48-838e409cb53a/2008_mercury_115_optimax_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/nunikarujunofej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f24995c-6d18-4003-9f3e-6ca6a619c6af/junamidipimagemuluze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545cfcbf-14ca-491c-9bb9-7fe59e4f8f08/55906213328.pdfIn PDF document text
    • https://dobaxululon.files.wordpress.com/2020/11/48013995693.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/kisscartoon_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/40130302433.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/53955507057.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000465a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x465A 4696 bytes
SHA-256: a58843ee68e85e830bbb2b9c019b0d867ee843344de0a01cc256f1be04a05242
font_01_sfnt_off0000567e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 10552 bytes
SHA-256: 10cd2617b6b2459077bbd306f3571b3ae63adf7c94b56bed4c0c72d6a19073b3
font_02_sfnt_off000079f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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