Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07d51a3780df9d6…

MALICIOUS

PDF

43.7 KB Created: 2020-11-09 05:28:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: ede52057ce6a55fb907ccae223bc1488 SHA-1: 0ba2924c6a2dfe437b71b7b63747e3caaae1b07e SHA-256: d07d51a3780df9d64f9ea2d7b1ac5fd96bf0b643feea1040aad3488b2891076b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/wb?keyword=example%20of%20community%20cloud PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f9236636a81b.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/emoji_game_guess_brand_quiz_level_3_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8d624892ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5fa10fbb5a727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f9ce7cebe83e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060b2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060b2.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009490.bin)
    • https://xigikomi.files.wordpress.com/2020/11/20503209757.pdfIn PDF document text
    • https://losorul.files.wordpress.com/2020/11/ruzepomagowo.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://kedijabu.files.wordpress.com/2020/11/jinojulukugogonole.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.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_off000060b2.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 5036 bytes
SHA-256: 0af41948f3cbdac2b5949a02e9f7412dabb8bd41b42dfab88f1332ddcb9db40f
font_01_sfnt_off000071d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 10220 bytes
SHA-256: 9666a810bc89f13d8728381e84f62c87f6e2e19946a9e95daf02ea5a79bae97f
font_02_sfnt_off00009490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9490 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333