Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d39704f4dbfbd1…

MALICIOUS

PDF

50.9 KB Created: 2020-11-05 20:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: b4eb744c3d8490c63ec71016ac3f7cb9 SHA-1: ee2d3fe8c5640147c2ee6012e52e9bd793a13cc7 SHA-256: 62d39704f4dbfbd13c683bc6b7b72e6d37792d1aadf7061e832d2cc74fe0f9fb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=paxon+games+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f90b52435a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f9215ea89bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f886a472d082.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/xofipukezolo.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/7955184.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/manoraniduvuxi_mutipemef.pdfIn PDF document text
    • https://sogenaluvejor.weebly.com/uploads/1/3/4/3/134328850/dimep.pdfIn PDF document text
    • https://borusolu.weebly.com/uploads/1/3/4/3/134327960/jozuditegoxi_kiwevexopaj_lilatuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5f8d133129b9a.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/muvarelo/napebesifebamagepulinejo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/corporate_ethical_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/mill_ridge_primary_school_danbury.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/zoxiwazavur.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/marijarixe.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_off00008695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8695 5436 bytes
SHA-256: 81e875be59c829b951704a3bb234f0141aea1066a5976471c553c1ea622d280f
font_01_sfnt_off0000990a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x990A 10708 bytes
SHA-256: ef2b3ebc2e3f35c521a9b70685737dc682dd249b6792dc1c3e5045cc9f391bcf