Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1addcee77038d35…

MALICIOUS

PDF

51.0 KB Created: 2020-10-30 19:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6b2de0170d3b08799d2c7eabcbf2ca3a SHA-1: 9c72d07bdb8cde3d33d7ed1e2ec230ca7c66e9ec SHA-256: f1addcee77038d35969e6cd36a3c6ad1743834b4c330bae63023182605e5e6b5
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://cctraff.ru/strik?keyword=nwu+type+3+boots In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8c655776253.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/e3dae420-b7fe-40d7-ac3f-b9cda25842e6/69087338864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8864/0698/files/android_oyun_club_critical_ops_radar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8122/8981/files/21090730009.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/division_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419081ca-494f-40ac-ab1f-9c6124da4e45/wesimune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcc5f5b-9bdb-4a89-9306-26b4a5878cb0/ffxi_puppetmaster_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/73585260411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/rar_zip_unlocker_android.apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/ceftriaxona_1g_eurofarma_bula.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_off00008a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1C 4944 bytes
SHA-256: 57956dd65a9ac37ee8ab61c2c0deb2a1a8883f834e423dfb3e77c7dcd237f666
font_01_sfnt_off00009b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B23 10884 bytes
SHA-256: ecee54bcfac16457d842d1dea0ac5fdb75f316fb2ebb54f2d1ecebf8451d5b40