Malicious PDF — malware analysis report

Static analysis result for SHA-256 028302822f7ae50f…

MALICIOUS

PDF

37.6 KB Created: 2020-10-02 02:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: abd7c14cd00c1a4c8b655da426c0f39d SHA-1: 30405d59e6cdb4a6aac97f9f110c866291c5a905 SHA-256: 028302822f7ae50f2aadc271f6a21e7c22a75452f18b2c7ad33e3f75f372d627
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/strik?keyword=kathi+songs+free+download+mp3 In PDF document text
    • http://nulabexab.westernanimalresources.org/uploads/1/3/2/6/132696063/patoxiwowu.pdfIn PDF document text
    • http://files.mkcheers.com/uploads/1/3/1/8/131856372/vuzara-wopiv-jokake.pdfIn PDF document text
    • http://jazelagi.sandlotwesterville.com/uploads/1/3/1/6/131606539/bajosulopovop.pdfIn PDF document text
    • http://muwejes.lucasmorneau.com/uploads/1/3/1/6/131636755/juwopubaduwuvuv-rapaxurosif-tilisitumoguw.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/1/0432/0182/2875/files/40857820151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7369/4613/files/mitochondria_and_chloroplasts_are_both_sites_of.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/sword_art_online_kirito_age.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/sidigizip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aab037e-7b70-45c5-96fb-4d20f28a43ce/62208355888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cce063-6e74-4987-abcd-131cf42ddcac/68423452176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a7622b-f7ed-4729-854d-935409dc7525/fevokojudogev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0925/5842/files/shadow_fight_apk_mod_special_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7544/1318/files/84565498514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2549/8780/files/robebizezizubemisimos.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_off00004b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6C 5680 bytes
SHA-256: 4313f7742b2e2d0f765a9ac7b27814f40dba163b864c1a305e790be37502fe47
font_01_sfnt_off00005eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB5 12920 bytes
SHA-256: f8fa4c8f3876df059fe351dd057f8eeb74b8a91de758f562bd4700b7a052411f

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