Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c3890a3137b016…

MALICIOUS

PDF

43.6 KB Created: 2020-09-30 10:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1a60a589eb4b81964280f3b762aeb5cd SHA-1: e4b07e754f84b796d84d58b34e18fb3e7a397782 SHA-256: 46c3890a3137b016bb917b0cadb9324842ec09a8e6c7216f16160defdf044227
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=alkalosis+and+acidosis+pdf In PDF document text
    • http://files.kyspecialolympics.com/uploads/1/3/1/4/131453990/nabijepejusifiraju.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/844fdd87-b37c-4194-8670-3fa0eead9a33/gewaxagafefas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e0def44-a154-4986-998e-de207e445f6a/pulatulazufap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f5375e-64fc-4de2-9bbf-85a703d2774b/88569770494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5889ecdb-d75b-4ac4-b455-b565b762e9b3/roridebopijaluxufagab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7931538-5701-4e3a-9bf4-d39416949f5d/zuwajekober.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa00519b-82d2-4c8a-8939-748347f34d1c/96159972697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b284cded-c0bf-4aba-8e88-1e3b5eff822e/kaxegilifidididoxakiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcef6e0e-5f6b-491e-8224-b95da0665425/6854057540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335ad87f-9ea9-4e8d-a89a-cd6477320a30/67568417989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa31d13-32dc-4c6d-afe5-189cbdbfa9b1/vobalenagetetegekalub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5906823-22be-4ae7-b8ad-9d7ef51dfcdf/79902389878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab63c449-483e-4ea9-8697-00677b36c7a5/72267938039.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 5

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_off00006e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 5108 bytes
SHA-256: 0e7354d50f05d1779177fcbcae5a6cbdada708b47bdbaa2b0419fde6fbba04f2
font_01_sfnt_off00007ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF1 9976 bytes
SHA-256: 44fc114eada6d153ddc65013f54119ebe19b6fb2fbabe85e83cae381346ca120

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