Malicious PDF — malware analysis report

Static analysis result for SHA-256 4715b0833d38e3c6…

MALICIOUS

PDF

50.8 KB Created: 2020-10-18 22:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4afbfe44268e9aa0ba0f71b2e303def1 SHA-1: e44a5e4136d9fe7463a669b697198f4e28a399eb SHA-256: 4715b0833d38e3c6d9b57ef34dcb858c811c547408f97a0279c560491130e416
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/123?keyword=hardware+acceleration+android+emulator In PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/077d58.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/nofamanitigap.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/favudazivifevamafu.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/zatajidavidejexuj.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/toridebi.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/1/0431/2793/1034/files/chris_evans_tattoos_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/mcdonalds_application_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1989/4425/files/map_of_california_adventures_theme_park.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5272/8230/files/vurugujunaxulebeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/nelesosidujijuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1851/6637/files/dijisanenifutebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1812/4963/files/opi_chocolate_moose_on_dark_skin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/5.70_8_tire_harbor_freight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1851/8179/files/xexewafikuxolutafulal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/anime_fighting_game_switch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/42187357854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/nixugakefolusepaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3935/7638/files/36878703614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/baby_sofa_chair_review.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_off00008857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8857 4960 bytes
SHA-256: 5b0c749cadd5d60c3b83a39222df36b5b9238369c5d072b5803cc957251bd067
font_01_sfnt_off00009923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9923 10560 bytes
SHA-256: ea384f4648676080c7ef4efa8fb75f0b0e4b55def96e2d09d3fedeccbf6e4c0c

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