Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9801b45b196df1d…

MALICIOUS

PDF

70.8 KB Created: 2020-11-17 15:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f149771fa013181ea349c8a91c207f99 SHA-1: 8836b9d7d895685c8f9fc8c50b5e4f39d2298304 SHA-256: e9801b45b196df1de4786f019b1b9ddf59c35bf31aee7df5df463a46f26689d8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=cognitive+behavioral+therapy+abc+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f903bb5e60cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5fa497dc37f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fa8150490d1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_5fb288a3dc61f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fabd26e93cb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fa08ff304e13.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/kipabajolera.pdfIn PDF document text
    • https://tupetipu.weebly.com/uploads/1/3/4/4/134489263/2293346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_5fb2c228bfc2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f93ff48449f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5f935c49935d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f873451a3242.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/1e9eedad-3c79-4fc5-acba-fa2d9cbc2a12/77212345281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0461d442-130e-4499-a020-4feb5ff1a5ef/11160941530.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_off0000d67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 5560 bytes
SHA-256: 0cb43f36c589f70b88fd5bd83cf95b40be407dbe2b1fd8f26540d7145cbfc3d4
font_01_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 10836 bytes
SHA-256: 1ca668502000c149274726ccfea4009b7adad20314c13ec62e4d66d03d550f96