Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c6e23d0f28f4af…

MALICIOUS

PDF

36.3 KB Created: 2020-10-29 01:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: eee09b40fc4ad0b446466d309e87eabb SHA-1: 09cd3a3c86616a4ae1844dee14ee63817326d9e0 SHA-256: 38c6e23d0f28f4afca6632e139942024a03d8859db48db324e1b553e7f4aff2c
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/aws?keyword=rose+of+cimarron+sheet+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f98910fd4f8f.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/nanajuzejurevibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f8d8c0b531ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5f970a5ad01e7.pdfIn PDF document text
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/penunosemoxuno.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/7442338.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004f58.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004f58.bin)
    • https://uploads.strikinglycdn.com/files/73c28936-fca6-41bd-8fac-a3d26685d4d0/common_mistakes_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1185/0407/files/nba_2k14_games_download_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/drawing_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb1f168-3d5e-4ee9-844f-f2379f1fcc10/14364686179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bec7c7-984a-431d-b0b7-f3489d43dc52/gaxafokojeruzogexafiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa60f4e4-aa64-4dd0-8036-a6d4e01fa2c4/yds_stratejileri_irem_yayC4B1ncC4B1lC4B1k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511e6557-8f8a-49e7-b419-7d71224afb69/piece_de_theatre_en_anglais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6163/2920/files/46883485225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4963/3950/files/23035800136.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/xefiligamak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b5c36e-f654-4e8d-a8aa-dc7170e9fab2/53771228113.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/baxorege.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 extracted file (font_00_sfnt_off00004f58.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F58 5096 bytes
SHA-256: 2a57d8ce380311a84485d9af8166485b0fed100a3cb2d099d628d416281f97e8
font_01_sfnt_off00006087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 10336 bytes
SHA-256: bd8a747ad37eb2a622186ecc82eadb3104a5a67a00d8f768a9237e618cab69b7