Malicious PDF — malware analysis report

Static analysis result for SHA-256 566c1274d33377a2…

MALICIOUS

PDF

39.3 KB Created: 2020-10-03 14:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d859354aa8982584f169d6eb00010df6 SHA-1: 12b4e318e47af7589ebde935bf5ef7021b36bcd3 SHA-256: 566c1274d33377a2892a2f59556878dab0f3f58288c3e3c3fd452f6d6dee3d23
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/pify?keyword=download+apk+root+checker+basic In PDF document text
    • http://turuzu.ramonaorganfineart.com/uploads/1/3/2/8/132814241/8388647.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/rafitarubajaje.pdfIn PDF document text
    • https://site-1039727.mozfiles.com/files/1039727/xoxubewakegegip.pdfIn PDF document text
    • https://site-1039817.mozfiles.com/files/1039817/82673452471.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/1/0493/1744/5791/files/csumb_library_cafe_hours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4101/5966/files/23832107080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6480/6555/files/dimikagibexolan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/counting_nickels_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7885/3284/files/titozolakusigizorediro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8670/3511/files/54908280333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3252/7526/files/cold_steel_bowie_knives_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8501/1869/files/driver_license_number_location.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_off00005c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 5456 bytes
SHA-256: 2ab3255ba27b3eb6676f9976b0da660548bd6ea2176e58b9d767a98886ccd01b
font_01_sfnt_off00006eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 9976 bytes
SHA-256: acf45d8fcb7e1cbd11cea3499b76a68c8d156e2c9873888147e7ea9544dd8589