Malicious PDF — malware analysis report

Static analysis result for SHA-256 208d984963f5e425…

MALICIOUS

PDF

40.1 KB Created: 2020-11-05 04:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2d5b2f258c35828552ebb9ed7d5fe310 SHA-1: a0625a525ed2143417ad083d82404ad0a87e57a3 SHA-256: 208d984963f5e425761ea5910d16ed4e8c071f22d0c654f5c133b4140014ea45
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://ttraff.cc/123?keyword=download+unblocked+games+fnaf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5f8e9bdf1feac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f96feef11fb1.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/likal-damaxawi-kakoguxuratisiv-dobutivigila.pdfIn PDF document text
    • https://vakuvovigoder.weebly.com/uploads/1/3/4/4/134467198/73ddab.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/4229127ae9e.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/7819085.pdfIn PDF document text
    • https://kafigibedup.weebly.com/uploads/1/3/4/4/134479504/209553.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/8b48a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5f9ca2427d056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f8ac42c67719.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/tezofuretejom/sharon_stone_photos_basic_instinct.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/91456152533.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/joint_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/abbreviation_free_download.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_off00005d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D27 5540 bytes
SHA-256: d322e47f7493196c18ea6d8c67febdaa9c0ca0d74acfd49a460267e3ed26e1ef
font_01_sfnt_off00007010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7010 10356 bytes
SHA-256: fec96d87c2e63a7395714960a66421411f671a67a895612ee5a465912ff79d09