Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4328e988a5f0b5…

MALICIOUS

PDF

43.8 KB Created: 2020-10-10 16:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 34a96c7dbe3987fa2e1cf68211c8bcc7 SHA-1: e837025ed2a57a31b0c46801b2b255e55bc7408f SHA-256: 9e4328e988a5f0b579d5be2b32066ddd064f0284e2cbb368930aec361ca21b0d
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/pify?keyword=hail+storm+dallas+2019 In PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/zujujokov.pdfIn PDF document text
    • http://wixel.loganahlersphotography.com/uploads/1/3/0/7/130776518/8902168.pdfIn PDF document text
    • http://files.tacjacksonvillegallery.org/uploads/1/3/2/6/132696274/656366.pdfIn PDF document text
    • http://files.mirabaipeart.com/uploads/1/3/0/8/130873718/dbc07c08b23.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/1/0482/2941/7112/files/giwijenapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2260/0350/files/the_incredibles_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4195/5221/files/66037782751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3625/3601/files/85828297698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2960/5785/files/21367477595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2681/1546/files/virginia_and_new_jersey_plans_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/5129096719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/74831974156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0990/0184/files/valkyrie_pvp_guide.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_off00006bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 5416 bytes
SHA-256: ee899c49280393c69c876abdb857d6a155ca76117a87b5bc5d116db5c2244b3a
font_01_sfnt_off00007e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3E 10536 bytes
SHA-256: be706a980314a90cde29b457434490dff51fa90f91de918850b85c1cc49bc4c0