Malicious PDF — malware analysis report

Static analysis result for SHA-256 01088690276c51b6…

MALICIOUS

PDF

42.8 KB Created: 2020-10-04 21:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ae04d7dccaf37266e8f2a500602eeec5 SHA-1: ec85d97f21940849cb0a97cc97ac98afc01aed19 SHA-256: 01088690276c51b67bcd2e1e215afc5660af1d0d7a32f35735a0e9481b21acf3
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://cctraff.ru/strik?keyword=crofton+steam+cleaner+manual In PDF document text
    • http://files.cgsparish.org/uploads/1/3/0/7/130775427/b7a3cd85c7165c4.pdfIn PDF document text
    • http://womamepi.anniefay.com/uploads/1/3/1/4/131453274/2d6ac7.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/13995952992.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/vimosajok.pdfIn PDF document text
    • https://site-1038600.mozfiles.com/files/1038600/66378574495.pdfIn PDF document text
    • https://site-1042504.mozfiles.com/files/1042504/mebavanovomo.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/1/0479/3942/0316/files/bass_guitar_note_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/model_hashtags_to_get_noticed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/zefilade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/57572015805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/deep_learning_with_keras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/3531/9461/files/85186359330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/notagawutopefatofuwiki.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_off000067e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 4932 bytes
SHA-256: b78ed07bec30993e3eccab5e34082ebb1e3fa6e8f94167f1fd152a7d100873a6
font_01_sfnt_off0000788d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 11248 bytes
SHA-256: a71bce36b86aed65df2b65b26e1be04df93e11af599e81482add56024842f0cb