Malicious PDF — malware analysis report

Static analysis result for SHA-256 457cfda37b80c9aa…

MALICIOUS

PDF

40.8 KB Created: 2020-10-31 02:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cfa9671f03c34141a0d52793b505c752 SHA-1: b29c018c5d96e7b2e075688b2b7dcab7395cd2c3 SHA-256: 457cfda37b80c9aa035bef38bfd1626e08377306016c9d00bc48ade2c1cd7d3b
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=periodic+table+assignment+for+class+10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8ddfb31efbc.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/ec2a272b2e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f9b65ccf2a29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f8ca4eb4dab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f8c7e2a2ee41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_5f9ca7671ba7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f96f2c5972e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5f96110240b9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f942438b7515.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/fe6c5767-ce85-454e-8537-00ae06e8726a/petifatanililepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1bf591-309a-4884-b374-415f1d2e05a5/xatasotina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335ab04f-0709-4fa4-b324-82bc61d9c05b/ganubulanabon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0276d3b7-db31-479c-975d-1179b959cb90/54725806786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f85c0d1-1cc9-4998-bdee-4ef74ce7ab2a/download_dragon_ball_z_ppsspp_games.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 7

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_off00006082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 5676 bytes
SHA-256: b5dae6233b26383bee54347a9968db31161bf31d54ea0f420332b1213f64470c
font_01_sfnt_off000073c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 10096 bytes
SHA-256: 1953ce12293e1ca78707766881f7c182d7a27db6ef0ff87bd106a021639c0909

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