Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c62482ff60c7e66…

MALICIOUS

PDF

37.5 KB Created: 2020-10-13 17:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd2e3474f3380615e28b1f4deb62258e SHA-1: 7e6229ab5e442527ee41be15bfd39e3e4e6e035c SHA-256: 0c62482ff60c7e669a106d2b6bd11ac30e07d45fadbc80d210ad35969dab18f7
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=scott+meyers+effective+modern+c%252B%252B+pdf In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.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/1/0482/0104/0024/files/98873603528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6960/2978/files/liberalism_of_fear_by_montesquieu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/boat_slips_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1424/2471/files/69239670083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7782/3385/files/life_cycle_of_a_star_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/12374332380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a0a7a2a-56f9-49c5-b6fe-8e49ed3b8b1c/54959649196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa3fdf4-a38b-4a9d-bb49-76dfb2293e2e/bajof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8eadd6b-4df6-420a-b31d-53f29e626e6f/pamoxokika.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_off00004839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4839 5112 bytes
SHA-256: 992d71d6a9c2aab9db69dca6b0662a69e2efbc9649f2583176adf6345da6c0e1
font_01_sfnt_off00005982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5982 9868 bytes
SHA-256: 8b9e0868894914211d4d0096a22382c944e08d0d90a8f66f1e00a7dd18c2c01c
font_02_sfnt_off00007b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361