Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e77fed3dc2b2b3…

MALICIOUS

PDF

60.8 KB Created: 2020-11-03 21:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 302b5ad88e62a9453016bc34cab346aa SHA-1: 770258f413aaefd640c1f0b6b33d1e05cbd1f201 SHA-256: c7e77fed3dc2b2b3bff692fb9c4aecacca85d616a2e7f53c2ac2d14aa17bfb48
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=igneous+petrology+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8f5383e8b3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5fa0269a76e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_5f93e3b7624e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8d18e10d3cd.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/aa526828-a4c1-4833-a292-dd6099f9e62d/349807480.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/more_reading_power_3_teachers_guide_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/29460554505.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/81973379900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c31d89-678f-440d-9ca3-9798257518cf/gta_vice_city_polis_modu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bfbc71-bdf0-4ed9-947f-d2ef8bccf0c9/19561242365.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/mount_ayr_iowa_population.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82bb8c4-1c1d-44ba-b61b-ee2d329a68b5/dorisimawaseverevabu.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_off0000b05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05D 5040 bytes
SHA-256: 880d00774590dbe435fac5654075393f512835caf8ce2e79213ad28fffc518a6
font_01_sfnt_off0000c1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A1 10800 bytes
SHA-256: 34b822de8910a6de4641c89de5eaa66f0360073d5ad0fdc3ede9aff9f89cb21c