Malicious PDF — malware analysis report

Static analysis result for SHA-256 665059014c91f56a…

MALICIOUS

PDF

67.2 KB Created: 2021-01-09 05:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 66be1658a85b3e62fb3af2c5a450997c SHA-1: ac904540b2cd54fe3a5b50c180ec024c816bf289 SHA-256: 665059014c91f56ab1161db092581fab134b6d122804ccbc6b78d85a7555e71a
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/wb?keyword=ringtone%20for%20galaxy%20m31%20free%20best%20new%20iphone In PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5fcf6a9026c4a.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/ij8jigi/over_smartness_quotes.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/1918593.pdfIn PDF document text
    • https://cdn.sqhk.co/fabukujeb/hiKMB9F/piwabanuxafutujixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5fced6b29b064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5fc07f4b79bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_5fa974700bcf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450430/normal_5fa51092622d2.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/a1e4e15b-ad46-4c7a-a475-d2831392f8b3/answers_to_fema_is-700.b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13d370b-c4de-4a49-9fa0-4e33027b44a8/fakolidanenanefujabiruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e278792d-b63c-496c-b80f-4ca24c6ecbd3/48391125800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503aa4e9-5c81-4975-aebb-6968f56bb3e2/51708680136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb70811a-7c28-4816-a299-8eee13c94520/minecraft_pe_apk_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda8fbdd-2a9f-47e3-88a7-58731645208d/ponidoparozezexijotuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/android_application_for_graphic_designing.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_off0000c9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B4 5940 bytes
SHA-256: ecc434a367e7c9a16d8e9efa66d4f63d5faf50cc5465fca9ccf68b9e7def95e4
font_01_sfnt_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 9940 bytes
SHA-256: 45123629dd228eb6773371271fa4d02aa8e3f403ca6c4e26c3bf526dce5c51bf