Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e38cf25c291d32…

MALICIOUS

PDF

41.1 KB Created: 2020-11-08 07:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 76c10e52c666f17c60566d71f7d3067e SHA-1: f2711e2ccdc681a7c69ca4012abe25c1b38629a3 SHA-256: 67e38cf25c291d320b8e6357d1ff3553a7a8e944c4bc27157552fee4a261e625
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=soccer+stars+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_5fa7417a10dc1.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/lupezimajepid-gopubakonado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f8e185e91189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f872a54844f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f89615d5a783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5f99eafbc6d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f9213e21190f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f9675a968217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409827/normal_5fa7330d82424.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/zerepuzuze/napujozotijoxuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29df71b-2da6-46b9-805e-4a674bfbdab3/pasilizidazosozelavapa.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/gezokezan.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_off000064ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 5240 bytes
SHA-256: 3c87d98c1996d1eb1431c4a07252f70ca4589725250e75c72addb1c349ecb48e
font_01_sfnt_off000076c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 9648 bytes
SHA-256: 402493c0fe4b8a4fd201e9c95acc6a76ab8c08fe8d6d43e9f31892e40c12ff6e