Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23ac2a85df945c2…

MALICIOUS

PDF

41.6 KB Created: 2020-10-07 18:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f1c90899aa25b9b52fe28419893c11f7 SHA-1: 65a317a6602b9b3f1c1c90d63b9fcd67d29e643e SHA-256: c23ac2a85df945c2bc41583f1bb5c892e1ea23869ef668f61d3d54b5b753c31d
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/strik?keyword=o+p+ghai+paediatrics+latest+edition+pdf In PDF document text
    • http://files.carltosten.com/uploads/1/3/1/3/131398385/pilidobareb-jugejo.pdfIn PDF document text
    • http://files.mulvaneystudios.com/uploads/1/3/1/3/131384771/6f40f1809d95.pdfIn PDF document text
    • http://files.chancesclipping.com/uploads/1/3/1/4/131437475/taxojelujefujizivuw.pdfIn PDF document text
    • http://files.shannonviolin.com/uploads/1/3/1/4/131406749/jetedufa.pdfIn PDF document text
    • http://files.gabrielledeveaux.com/uploads/1/3/2/7/132740399/dasegewerugebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6588/2277/files/xedarivajusavefodosevexum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5580/3299/files/texitofin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1551/0952/files/20699413745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6926/0184/files/xeboligakewasivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2830/6341/files/guxepunaxabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aac1b2a-0d23-4b33-b54d-bdd39edf262b/63152460562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66109bb-acb7-408c-9e2c-1704576ed3f6/noveketotutoguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cf6963-0730-48b0-8df5-a17675b67117/jiwosowunudalirubez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e341e0-4c94-4ad2-bb65-78790cff5f63/jumuxupapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3989/9039/files/29963667542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/young_hall_ucla_2200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/tanegoririketimenojejel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DB 5444 bytes
SHA-256: 5c100f0d38fd763ebe60a4501283a4ce7f111a079a360974e4cd03a0da3d1dd7
font_01_sfnt_off00007557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 10588 bytes
SHA-256: cdb1aefe60ec6a47b3d77b272d91d3ced613fbab219e80d8ad95b94887839551

Open this report in the interactive analyzer, or submit your own file for analysis.