Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a8c4388842fd9c…

MALICIOUS

PDF

54.6 KB Created: 2020-11-08 23:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c5ba415a5242997d042205e479528b8d SHA-1: bce1a15d6e4927193e6becaec03d20e01910148e SHA-256: 32a8c4388842fd9c73a592043386915fe4b994ceac92263c33ff97884961b9d6
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://traffset.ru/aws?keyword=music+theory+multiple+choice+questions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f87c0d24e9f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8f3cf092923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f8cb0e64aa10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8c3a6746317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_5fa6a5cd5bc44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fa0bdb04f346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f9203ec8e913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_5fa16bb0aeb6b.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f888d1090f84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f89e70b42dec.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://wejelugiz.files.wordpress.com/2020/11/download_game_hungry_shark_terbaru_mod_apk.pdfIn PDF document text
    • https://votosajis.files.wordpress.com/2020/11/zubetifene.pdfIn PDF document text
    • https://papirekowu.files.wordpress.com/2020/11/nopumaline.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://tirutijupez.files.wordpress.com/2020/11/87397976515.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 5080 bytes
SHA-256: 21bc9fe197af359311b75ccd408b6c1d868f8d4b99c330a9f70e492a2e6c0913
font_01_sfnt_off00007aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 2044 bytes
SHA-256: dedd9ef44456abfe44c7d977340348cf6e06f093193479021ef22f3fda36509b
font_02_sfnt_off00008420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 11012 bytes
SHA-256: 298ba37a49e08b8d3f295056c636eb3bf468bf681f68c181d9bdb3c1fe718542
font_03_sfnt_off0000a9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C9 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
font_04_sfnt_off0000be31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE31 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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