Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d35dcc7206c71f3…

MALICIOUS

PDF

41.7 KB Created: 2020-11-07 03:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b5c85da36945d823d94dc55291f71637 SHA-1: 4fd3803c400f1529c2566047e8d9f703a274cb11 SHA-256: 0d35dcc7206c71f3196ae17fcbc776f03e4ba3868b9bc37716eddd58872694df
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://traffking.ru/aws?keyword=skyrim+ogmund+talos+worship In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f88a49d7897c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/65544104511.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/american_express_confirm_card.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/tank_trouble_1_player_unblocked_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1e4cb4-1d23-4a68-8744-827ceb7328c6/27606929144.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/varus_guide_season_10.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/xesisopigula.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/network_product_guide_award.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_off00006100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 5736 bytes
SHA-256: ee5185bfa28b224cba3b3ecb514b78331ac97474972899b49d81cd9b3ba5a7be
font_01_sfnt_off00007475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 10848 bytes
SHA-256: a8112ad3d8a966c8b4ef76ac78c237a28104249266aba7f47b10698a52c3ba52