Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b75a8614e68e102…

MALICIOUS

PDF

37.1 KB Created: 2020-11-06 09:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a9a3e46e030b915edd40a6892c51a7f1 SHA-1: 050a6284272f4b6b5cab235faf9d8a1736d44dbd SHA-256: 0b75a8614e68e102f559cc251cea3d8995da704965694797bb5dc53dc6db21d7
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=origami+turkey+hard In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8747ae20e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8728587e23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5fa4eb432fab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f98fa63384c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5fa4eacd16e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f9577c54917e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5fa3857ff318c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_5f8e1fd238d36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5f903a15f0125.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/lodazojamuva/uprising_by_margaret_peterson_haddix.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/wimanit.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/lumujol.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_off00005338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5338 5224 bytes
SHA-256: 52c617aec752d5993e0094d9d328967d260c5e04c798962909cabdad5948f2d5
font_01_sfnt_off000064d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 9848 bytes
SHA-256: 7b00f22b46d30d6ffd7b16b46cc234567ea1416692bf01968b621af9d38f3138