Malicious PDF — malware analysis report

Static analysis result for SHA-256 b066206244c92108…

MALICIOUS

PDF

39.1 KB Created: 2020-11-04 16:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c912e52944f24a42dc6c413be4f17732 SHA-1: 5fead18d15964477673f1d2ddbc03986bef162e3 SHA-256: b066206244c92108377a3756e5376bd16aae5e90114172c9cd2a3e5b2fd1afec
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://ttraff.cc/123?keyword=waimea+middle+school+jobs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f87b80a7170a.pdfIn PDF document text
    • https://niviraxaxupo.weebly.com/uploads/1/3/4/4/134469592/tukuzaf-resapiligesomuv-fazogorarara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f9723b406efc.pdfIn PDF document text
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/1779560.pdfIn PDF document text
    • https://vukumurumijolot.weebly.com/uploads/1/3/4/4/134433046/bidaxuge.pdfIn PDF document text
    • https://julefezi.weebly.com/uploads/1/3/4/1/134131413/a02c1285.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/zetare/41962533271.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/disposable_waterproof_camera_kmart.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/favodes.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/32042422730.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_off00005cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 5312 bytes
SHA-256: 82a2b2fc098d82e073fe731a74fd55a2d39134d7cce4b9a766097a0f39a24680
font_01_sfnt_off00006ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAD 9764 bytes
SHA-256: 4db6b2209b19472dcbe707c4b33e132832115902cd93909bb233dd189b636e3f