Malicious PDF — malware analysis report

Static analysis result for SHA-256 4343182113a50af6…

MALICIOUS

PDF

45.6 KB Created: 2020-11-08 10:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 805571a8cf40dfb7b473995a8d54f35c SHA-1: a2e20d98ab2e73eb31dc8c69a773a6591c75c41c SHA-256: 4343182113a50af6488b6477cc4590f7aac6ab18a6f577466bbf2ef8f883ede3
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://traffking.ru/aws?keyword=walt+disney+leadership+video In PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/594bcbeef37654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401982/normal_5fa3a3e1a744e.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/8978e2f610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5f920f061bbf5.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/b59e853c-b91f-4a87-9308-d31bc55b97cd/asvab_afqt_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d734a8e7-7db0-40c8-98ba-9fb750fd22ec/nazuxikelakazinejida.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/manual_for_timex_t235.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/74596541336.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/logozofi.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/26615095718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98235fd3-bde8-417c-9d7d-d4440039fdc2/16797545557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98289d2-de2f-401d-8319-57ff27e0ece7/lego_star_wars_android_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd0e819-75a2-423a-bfde-04ff826ba55b/prehospital_trauma_life_support_military_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249e081c-52ea-46d4-a38d-c525407bbeb8/rexivapowase.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/active_voice_and_passive_voice_table.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_off00007578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7578 5220 bytes
SHA-256: 22a5038a3f126fc452e7dc8e314df6104206e82e2d51edde85b1055f5bb0fc4a
font_01_sfnt_off0000874d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874D 10040 bytes
SHA-256: e51a28671e57042fb587be423ef02c2ec0f42d9691d9dfaf994785164cefbf09

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