Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a7ecc11d733d4c…

MALICIOUS

PDF

54.9 KB Created: 2020-11-03 12:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ddbaca35fb3df3d29c5ebb7aada31812 SHA-1: d848f9ae0fdf25b3f3bc17e636887347a164eba4 SHA-256: 36a7ecc11d733d4c7f03310aed238ca959de3d1d539f31e68b36f954b341ac15
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://ggtraff.ru/aws?keyword=monkey+madness+quick+guide+osrs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8b2eeca72b4.pdfIn PDF document text
    • https://nimubawelekuf.weebly.com/uploads/1/3/4/2/134265751/8b18579834a4af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_5f9d0f0eaf62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f873f5964702.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/53dbd4ace875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f9ae995cb5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f87623446fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5fa0cb781d37d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f8755f0ec376.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f9553e16-7f77-4b45-bc29-ef14369e3d6d/more_brilliant_than_the_sun_kodwo_eshun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c9dfa4-86de-4f3d-aa7d-2bb7a7b60ddc/74961252229.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/buwilirofugabudok.pdfIn PDF document text
    • https://s3.amazonaws.com/xenepedu/kenmore_sewing_machine_manual_158.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/kedinabanenar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 5328 bytes
SHA-256: d2ad523237f3243c6e204e1d3ea01953105d6b2f2a19231f460e3f66558760c4
font_01_sfnt_off00009c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C63 10448 bytes
SHA-256: 306d477734ce6bcba936ccfe8cb738557707d5908ffaed31258fd293968d1e53
font_02_sfnt_off0000c02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC02E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176