Malicious PDF — malware analysis report

Static analysis result for SHA-256 e328f43a6e2d9790…

MALICIOUS

PDF

62.4 KB Created: 2020-10-13 20:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 876aad8efcaa1eb2d2e3c52829e55c26 SHA-1: 0a3de294927586aca358d1a2f4f8787164e32854 SHA-256: e328f43a6e2d97901320e7d0c6791c18b2ed9d78f51a077d7d48de969ccdb5dd
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=two+step+inequalities+guided+notes In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.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/c7650172-da72-4ce2-8f9d-8b0ee122f9a3/89922166266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6cd7516-5f52-41c1-b3a7-2582bc687a4f/83864262733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fc1129-3ef8-49b5-8dc0-89f52d64c487/67050136165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835738bc-6ece-4115-8ba0-923e43b97396/77363700330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91257366-c02e-4873-bc65-bb5fae73879b/57602301282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2273/5765/files/peoria_illinois_daily_commitment_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0413/6093/files/large_fanny_pack_with_shoulder_straps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8456/9494/files/golamelamekibigopazugol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6969/2835/files/repulsion_pathfinder_2e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/2020_science_olympiad_trial_events.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/korean_learning_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3526/6719/files/red_velvet_bundt_cake_mini.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_off0000aa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA28 5200 bytes
SHA-256: d093f626d587e24c04391940b24d58887014c08641f96eb655e9a8f1aeace76e
font_01_sfnt_off0000bbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF4 15404 bytes
SHA-256: 11d9afd9a735ab758520573fee6743ed6212c290c1d156e6fb9a96060e1a24ff

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