Malicious PDF — malware analysis report

Static analysis result for SHA-256 9883d65f6489021a…

MALICIOUS

PDF

40.8 KB Created: 2020-10-02 00:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2bebe1615e880a34099982d8461746e4 SHA-1: a4942ebfb414ef01aa7077ffbf5eb1a114070b6a SHA-256: 9883d65f6489021a4edc34b018e6cdc157006d511dc238e20fee18622ba981bd
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/strik?keyword=tangram+puzzles+free In PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdfIn PDF document text
    • http://files.victoriamartinphotography.co.uk/uploads/1/3/1/4/131437949/3245473bba.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/1/0432/0644/3163/files/bell_hooks_killing_rage_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4712/7720/files/lotipapulomemoremikape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4218/4095/files/mabofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/22186250969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/precor_zuma_exercise_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac7e2c4-725e-42d6-ba62-e5d1868a7e25/kuvikakixozivegisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c871c19e-811a-46a6-ab76-578363fdc344/45360928782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53835bd3-6f6d-45e6-a5d6-d1997c8cb396/wejagugofemanef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c042a44d-6ad7-4282-aad8-f480e87c1b05/62351597989.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D99 4864 bytes
SHA-256: 9159d51450e884476c033472b731526c9917beecc89124a9af34aefd0d0e344f
font_01_sfnt_off00005e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E02 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000668e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 9844 bytes
SHA-256: b793a59c2cb7e063c6e9517e206177767db4ac7503d66401926fc61f26263c93
font_03_sfnt_off00008848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8848 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3