Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dd4d9446de24e9…

MALICIOUS

PDF

52.5 KB Created: 2020-11-09 13:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 61038b8dc1d12dab0b02ac8a913bc695 SHA-1: 4c57136ffa62cf9691bbda2ef4f469108b1fae61 SHA-256: e9dd4d9446de24e95f6949167023913c8fc4cf7c4445c03b38d6d7f8202910b0
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?keyword=gw2+salvage+guide In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/judife.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/likuto.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/11e8c87510a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f90c82f7ae8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42453743-7d95-49cf-b048-d508a95c8000/89584252057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50785d7-147c-4dd4-9f3a-fde3ab4909fc/4399818331.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/american_army_bases_in_germany_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mupuraregonu/yard_machines_3.75_hp_edger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/wufavenumuxipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d6a0b8-5bee-49e7-ba8a-3ff597e660c2/redesaxuk.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_off00008e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E94 5212 bytes
SHA-256: 0942171bbb632434dd71978ad4ccee1db5605d5709b5a881cb33d865b53ed5a7
font_01_sfnt_off0000a083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA083 10844 bytes
SHA-256: 96f021bb7b0e22e8547868da896475844360a0c4347e23f5f4379f9d0364a5c4