Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3cc33258f06dcc…

MALICIOUS

PDF

46.1 KB Created: 2020-10-30 14:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b7fe1e2a7335c694012ba3620f414715 SHA-1: 41b8f9f183ceac12c22932a413019453398f86cc SHA-256: 6c3cc33258f06dcc06f6b682c79302f30ed6a9bd40f342f21131595ed7010f58
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://cctraff.ru/aws?keyword=banjo+nuts+and+bolts+cheats In PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/dumirisefamul.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/3e7f5e3af9163f.pdfIn PDF document text
    • https://nulumekut.weebly.com/uploads/1/3/4/3/134373747/fujetoje.pdfIn PDF document text
    • https://kuxunudizovisaj.weebly.com/uploads/1/3/4/3/134321976/5044828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f91335920d45.pdfIn PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/dakemivewokalapen.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/7376132.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006861.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006861.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009dd4.bin)
    • https://s3.amazonaws.com/tuxenipup/operating_system_deitel_download.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/23713769032.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/ruwunojumizem.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/eduardo_galeano_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/kowagemasepadodi.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/visakor.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 extracted file (font_00_sfnt_off00006861.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 5032 bytes
SHA-256: 7dd7532e28bd2bcc2f8112fb96d5f280b0af254fb873f08dd0f1cb2b4c6cc686
font_01_sfnt_off00007977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 10640 bytes
SHA-256: 6011efdbd8cc15b77527757d8b04af2f6573ec06ac68b86d157ce5f1b5f5da97
font_02_sfnt_off00009dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c