Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0693b905018e21…

MALICIOUS

PDF

71.0 KB Created: 2020-11-08 22:30:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 81d31b3e0c319992f60a0eeb9f14b7ff SHA-1: 94125bf9170656d8c8873898b25934ebbc884a7e SHA-256: da0693b905018e215fc4118915b5e35c22d6c992eff49c471e3280d78455bee6
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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=anime+like+stars+align PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f8b9ce56ab5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454803/normal_5fa0c2b18c8fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f91ea83d1340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f9e027e90f98.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/zesotat/purpose_of_government_hobbes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eea347e-cbc8-450f-b5fe-8fcfa9d58b1c/zirixumokusodupizegusuruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eee708d-703c-4c82-a325-3959ade92943/mohit_bhattacharya_public_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/99320900993.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/black_swallowtail_butterfly_symbolism.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/77132347505.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/full_movie_brave_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/83451403235.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/important_constitutional_amendments.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8382 23228 bytes
SHA-256: 1b0a0f4cb645adfeb2d2af19e51c26cb6b0a1ea9dc008b6a3c00f69dd1bfe144
font_01_sfnt_off0000cc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC74 4736 bytes
SHA-256: 89597bd98da04645b00ad5e174a6312b3eb61bb75ab0f41fd55db8f53505c28f
font_02_sfnt_off0000dc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC55 10464 bytes
SHA-256: f4c15e8ffce9a3d1c200f9318dfafa5e30e1728ce0476a58b9bb6e722dcf827a
font_03_sfnt_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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