Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef60b1372740dcc…

MALICIOUS

PDF

53.7 KB Created: 2020-10-31 15:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 194b0b43378b0ba2637255dc61d61007 SHA-1: 09d89282b9a4572fea035aa2e82ca4243c75988d SHA-256: 3ef60b1372740dcc0195e1aab0d1679bf6f3eae57bdfc5dc588298326c72274f
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://ttraff.me/123?keyword=feral+druid+talents+shadowlands In PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/8517092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_5f93fdb68b958.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/nuxug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404122/normal_5f9859fa74614.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/bulivovajuzonabazide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8ed13259f98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f871636231c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_5f8f7fab86c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5f8f39dd38469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f88ed25312ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geradi/74538963330.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/31239678400.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/wezasavifumegukavak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4338/7070/files/voix_passive_et_active_en_espagnol.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/marketing_research_process.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/38158292924.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 4960 bytes
SHA-256: d0aa103088898997d1081c5007eb114a8a1f9c818e628fcd55da29c529838f24
font_01_sfnt_off00008ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 10744 bytes
SHA-256: ccb928bb7ec9d8d4e79df5f5d4fd3a23189a3a83a856a3f9db085622a1f83b3c
font_02_sfnt_off0000b4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DB 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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