Malicious PDF — malware analysis report

Static analysis result for SHA-256 c066e029b0bc8de6…

MALICIOUS

PDF

54.9 KB Created: 2020-08-22 01:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9646c64e57c131471e09f93ccc997d09 SHA-1: 3d17f935d34744e622202ed97af9bc35e4d82e8d SHA-256: c066e029b0bc8de625c424bd151dc51ba58ab342bc21e0a1829888128c1ae96f
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://ttraff.cc/pify?keyword=milliken+publishing+company+answer+keys+mp5120 In PDF document text
    • http://wexejemu.nutriandmore.com/uploads/1/3/2/6/132682076/7170594.pdfIn PDF document text
    • http://files.withinyourmeansdesign.com/uploads/1/3/1/8/131871902/voririxub-sibowixa.pdfIn PDF document text
    • http://files.uomequestrian.com/uploads/1/3/0/8/130874668/bedifisesulejedaxo.pdfIn PDF document text
    • http://files.alessandronardini.com/uploads/1/3/1/4/131453645/kubijifaz.pdfIn PDF document text
    • http://files.community.jesstopia.org/uploads/1/3/0/8/130814225/1333368.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/1/0432/1338/9992/files/greenhouse_effect_gases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/51331934389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/50058341863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3990/files/stephen_king_short_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/zujejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/8737993780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/1369651434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/govugesasigoxezupeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4325/3406/files/us_history_books_for_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/pipawotisagoloxipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/tiger_woods_pga_tour_08_instruction_manual.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_off00009379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9379 6200 bytes
SHA-256: 8b88182948f539f03612ed1b979351d9b108d07c818eb09d61b9fc3843d12bb1
font_01_sfnt_off0000a87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA87C 11260 bytes
SHA-256: 8193d606c59217b637d32efe6f3c90d79f01bf70546f80f269337153d20feb38

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