Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0ff83c7a5696ee…

MALICIOUS

PDF

48.9 KB Created: 2020-10-09 05:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f54e3e85778b59119cdd428761ff87f9 SHA-1: 60f829d600b5901a1349ca89af720897ef0d4cd7 SHA-256: 9f0ff83c7a5696eed65ad02ede58264617b4b3a4fe0c9804952e561652b12e9c
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=waiting+for+godot+script+act+2+pdf In PDF document text
    • http://files.dudleycameraclub.co.uk/uploads/1/3/1/0/131070872/6373014.pdfIn PDF document text
    • http://files.biggleswadesquash.com/uploads/1/3/0/7/130775427/3343727.pdfIn PDF document text
    • http://files.anandafoods.co.uk/uploads/1/3/1/8/131856100/6473010.pdfIn PDF document text
    • http://files.crowlitmag.com/uploads/1/3/0/7/130775462/a15c0d911cfc61.pdfIn PDF document text
    • http://tenibuk.outstandingjewelry.com/uploads/1/3/0/7/130776322/wobul_rezavibor.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/1ec325b7-a7ce-43a3-b3ac-0733f3ff7bed/rusilapibigam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e06f9ed-fdfe-466e-ab59-c44057ff1112/ruteropisipozupowijuxop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2999264e-6619-42a3-8157-492108602bed/kunebepenepuwufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ec285e-f2d0-42eb-8d19-50237e6f25c9/xupofivuwuxidox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c1f3aa-870d-4308-ae43-7592794c93a2/migalekati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7017c0d0-bb25-4a66-bc3b-b4c0eb33e94d/96242779532.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_off0000817b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817B 5436 bytes
SHA-256: f1b852cc3ad1a218ceaa799a5320a3c25f2f1816439de88e129e38d1bb184593
font_01_sfnt_off00009420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9420 10168 bytes
SHA-256: 2c5a10c0590f3891f4d68c5d44fded7134d003a83829eed068cf32ff6cc69149