Malicious PDF — malware analysis report

Static analysis result for SHA-256 a668ae32d17d5e90…

MALICIOUS

PDF

53.3 KB Created: 2020-10-31 15:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d55c8fdd0ba9da868a5983659d3048d8 SHA-1: 2b7ea974b602e866aae2a0ef7c59fa53de0180b0 SHA-256: a668ae32d17d5e903376fe326653cd46089a80356d5af7971f27b264307a9ac6
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/aws?keyword=sha%2527tari+defense+rep+guide In PDF document text
    • https://garigewofunem.weebly.com/uploads/1/3/4/3/134314314/tuwosikedunefi.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://cdn.shopify.com/s/files/1/0266/8989/6624/files/ledejadumudolixoxatat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7757/5855/files/cablevision_optimum_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/shen_ling_bai_zhu_san.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/gofizozixuzoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7065/2061/files/6416060554.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/bhakti_sagar_book_by_sharad_upadhye_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/lukipimijoxixebar.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/fejumagejebabepugagej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e892843-0ca6-4afb-8a01-9cef37c39723/69261027798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5958/2373/files/unblocked_games_66_stick_war_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/zamuxabizokopebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8519/4150/files/edad_adulta_temprana.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/tripwire_hook_recipe_1.14.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/rijapoloxobukik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3803/7910/files/cn_iii_palsy_causes.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_off00008200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 5180 bytes
SHA-256: 8c2b6c583d8da2ff26c7007e26011101754896aeb905b4482e8afcabe5222d25
font_01_sfnt_off00009394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9394 11300 bytes
SHA-256: 54fe263a1d4f5e2e29a1aa9347e4112ab5483d056da5af9f536d065277e03f0a
font_02_sfnt_off0000b9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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