Malicious PDF — malware analysis report

Static analysis result for SHA-256 df24a0b38f79bd1e…

MALICIOUS

PDF

44.1 KB Created: 2020-10-30 11:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 046d17962dd67fbb26a81efa6c3cd605 SHA-1: 55dd72c60fb4f28ea0fded3e1091bf3056fee8a3 SHA-256: df24a0b38f79bd1ea016ac5fc9b497f77669597e41bde468ca744358163a7ea2
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=biology+if8765+page+76+answers In PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/7305906.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/puluxa.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/8448799.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://uploads.strikinglycdn.com/files/ac8171a0-3468-4092-91be-d98d93a8dd0a/83276654521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5939/4715/files/mathematical_induction_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0183/9267/files/61989047098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8929/2184/files/12242711707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4874/5152/files/asturias_andres_segovia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3851dfc-71a8-45e0-80cf-cc323af87dc5/41729175820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6fdcacd-e542-4f54-a77a-8089b9d6f235/7450764930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2097ee-e0e5-467e-a219-8c545c7928f9/54644707891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1781599-e28d-41f6-9790-5c857efac728/fahrenheit_11_9_torrent.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 5572 bytes
SHA-256: 116b15d5f4423fccf3cb176600d65b936177cfa99fc5a68d92f18181161499f3
font_01_sfnt_off0000742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742C 9812 bytes
SHA-256: 623487335a779d6510ba2c85724ea229692d32a6eb3fce0cebe0389eaee53740
font_02_sfnt_off000095af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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