Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3c3e0aad7ece14…

MALICIOUS

PDF

68.1 KB Created: 2020-10-06 10:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7724cf26791fa4c9bb346d1f18b47fec SHA-1: e8d76b5692d6a0e8ceab4f1c11837db4d7c23cdd SHA-256: 5c3c3e0aad7ece14c9b2aa68a4b978eef1172a5f6b735b3ccf326d39f1d3a904
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/strik?keyword=the+art+book+big+ideas+simply+explained+pdf In PDF document text
    • https://site-1038547.mozfiles.com/files/1038547/ziganulelisapezokejaxi.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/73361471001.pdfIn PDF document text
    • https://site-1038771.mozfiles.com/files/1038771/91649083213.pdfIn PDF document text
    • http://files.chrislchristoff.com/uploads/1/3/1/3/131379546/1031661235.pdfIn PDF document text
    • http://files.kindredliveband.com/uploads/1/3/0/8/130874582/japeno.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/fbbbad70-9040-49bd-b6f0-ee8158815873/55740171827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4069dc36-37c8-4e43-94f9-628e0b7a2450/vizibogibajafizazexelos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ca1154-4006-48d9-8b33-2f7704e75fd3/76818231945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7245ee2a-7982-46c6-9496-284c408093da/53219184815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477d9d06-a015-43d0-bbb6-8a2f097f46f6/52024019495.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 2968 bytes
SHA-256: adb4a69814229ee5a2939f27515552366b2134decbf91a1af3ad431506d78527
font_01_sfnt_off00009063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9063 5780 bytes
SHA-256: ae02fe5eeba35e5626420fac1279bee31a7dedfecc415aa2e6635150a6ab0252
font_02_sfnt_off0000a3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E1 7672 bytes
SHA-256: be05eaa2647d02c2735ecd809c6ef3c89563f89a509767d4b498ff96f3c65dcf
font_03_sfnt_off0000b95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95F 14656 bytes
SHA-256: 5bf168cdd4eff83def61fbab2469e028c5485066cf92ae2279179608e29b740e
font_04_sfnt_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 17228 bytes
SHA-256: 1179d01999d3d201576c6b18be2b9a42c2aca0e7e2b2eb0cdb109e327758e152
font_05_sfnt_off0000fa5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5E 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19