Malicious PDF — malware analysis report

Static analysis result for SHA-256 336db466cc06c1e2…

MALICIOUS

PDF

40.0 KB Created: 2020-10-03 08:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2cbd2adc8c8de281d0b8327fa777890f SHA-1: a565792bda75d4c20630a1a8e6b0dbd7ffa7e3be SHA-256: 336db466cc06c1e2e77532baec4d8c2eea774bb54f671f0cdfa4715e75cded36
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=mastering+chemistry+answers+chapter+15 In PDF document text
    • http://sotose.barcelonaplanetfilmfestival.com/uploads/1/3/0/9/130969422/820f8cd0db.pdfIn PDF document text
    • http://files.elizabethdentonwriter.com/uploads/1/3/2/7/132712676/da49dd5c82af8.pdfIn PDF document text
    • http://files.palm-beach-divorces.com/uploads/1/3/2/6/132681062/nubilanusozexobak.pdfIn PDF document text
    • http://files.kodecoon.com/uploads/1/3/1/4/131438353/7123398.pdfIn PDF document text
    • http://files.farmingo.org/uploads/1/3/0/8/130874283/296bbade.pdfIn PDF document text
    • https://site-1038782.mozfiles.com/files/1038782/62512090696.pdfIn PDF document text
    • https://site-1038904.mozfiles.com/files/1038904/finitavanejapasofonomup.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/1/0432/7522/3206/files/33896016346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/radioactive_penny_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9713/1670/files/33303397034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2622/9666/files/3.5_ability_score_improvement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6374c9e4-0e1b-473c-b290-c8d7f51ea056/86331945524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a90f5e3-1b31-4af6-998e-b97291b5f6d2/46029123032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44340ab-0a3c-4e37-a427-e671f47d663c/wurejaxewimoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c63c80e-681a-4811-9f5a-9537afe8e7e0/lokokejena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d46122-49d9-4ff8-8940-fbe4e6a92b11/melaragulafunuk.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_off00005a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A91 5692 bytes
SHA-256: adbe3ceb4bc61acaabef734834496b4b9e9ddae42c90e7d3747c3be9fc166d84
font_01_sfnt_off00006dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 10832 bytes
SHA-256: ebbfbb5a453c099bee2cc82dc9bdc6adfc4213b1e4260486ac7b4e51a11a5ba3

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