Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12d6519de04045d…

MALICIOUS

PDF

41.9 KB Created: 2020-11-09 11:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ab87d642ea2a21dea12977b8a0793600 SHA-1: 947250974dfd184f447eedcf084a07baf23fb7d4 SHA-256: f12d6519de04045d0c3a3adea941c2a2841e98820156b7b4e127c11ce9eb1ea2
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=sharing+events+on+google+calendar In PDF document text
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/wovol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f8fb418dd993.pdfIn PDF document text
    • https://lonitavow.weebly.com/uploads/1/3/4/3/134355974/6ed37e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_5f9d6c81e02fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f93c0fe4a0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8d84634c28d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f962671a713d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f8f0537a6d85.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.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/zuxadol/symbols_and_abbreviations_used_on_admiralty_paper_charts.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/acute_urine_retention.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/82194492349.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/zilew.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/39077508839.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_off000064ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AB 5364 bytes
SHA-256: fd19b656b73e2cd75e930653dee14f64cfb6fb3977316481583085669aee269e
font_01_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 10496 bytes
SHA-256: 51eb31fd97962725326cf8af3c1dd32a5730fea0d4f0d525e82d61a26be6092c