Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17cd05bd2d74cf1…

MALICIOUS

PDF

41.8 KB Created: 2020-11-06 22:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6e28feef775da3244b06ba5b4e9ebd02 SHA-1: 1aa6cf0c75fb9bb7eccf141149e896dbc9f74aea SHA-256: f17cd05bd2d74cf1f4f654fb7a9defeb002b2b8e49a380bb460213d8a1482c87
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://gettraff.ru/wb?keyword=dogfight%202%20game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f8e7fb0b0f19.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/bidoxelidebope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5f944c1f39ebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fa34809a7e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f8f8ed9c14d4.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/e3eab08a785588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_5f986c6033145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_5f9abfaa9c03c.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/dazifozixawus/62173835562.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/27077497267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881cb7ca-1149-4fc9-957d-f8560edfcdad/kogumesijemitabofijomel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051aa7a8-b805-43d1-897e-f7cb1f55ac54/reedy_creek_park_events.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_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 5008 bytes
SHA-256: 48b584556d4750b2534d0c664e8d7a96aefbd050614594f76fcba4be2700f672
font_01_sfnt_off00007673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 10796 bytes
SHA-256: 70c31f9630826fee21a5403616baf8fdb12bd19a4fea1f3dabf032d9cf1a88fa