Malicious PDF — malware analysis report

Static analysis result for SHA-256 015c3a0a1cd70815…

MALICIOUS

PDF

70.7 KB Created: 2020-10-02 03:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 041a759a5ab68ff617a73f9a36bfc2a6 SHA-1: 21bf629f03488c327bc32beab2df521a3c239c11 SHA-256: 015c3a0a1cd70815cf0fb46627e85d14f646e19785380f55ffd3c147a01dc76b
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=ballet+terms+with+pictures+pdf In PDF document text
    • http://jovokez.glfenterprisesstone.com/uploads/1/3/1/6/131606227/592825.pdfIn PDF document text
    • http://files.aaltowib.com/uploads/1/3/1/4/131406806/3529480.pdfIn PDF document text
    • http://basulatiw.matthew-radford-davies.com/uploads/1/3/1/4/131453943/kodogozagejigik.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/1/0440/4012/6614/files/xujerasamelamilivaridefeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/zinirupotavafesuzozila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/10316968773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0913/9110/files/halloween_basketball_legends_unblocked_full_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/97056450749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45311bc1-1eaa-4ef2-b34e-f1a9ced0ed8d/54936757137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30a489a-45ee-41f7-a2bf-472b1dc49c02/zigelipul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdff0c2-cebc-432e-895b-bb75560f23c5/buwofusizeludujikajeligi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd872392-8ccf-4523-9ba8-e42c25d61311/jemelave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4280cb-6b33-4dd9-9cf2-e9e4644f6803/49097020547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f8d674-3b37-4d01-97a3-1ba8a7cf9f47/jedejivajemopol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060a8cdb-1f61-48c4-9456-07bf98a32246/wekep.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_off0000d27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27D 5536 bytes
SHA-256: ad281e1d3323570df4c377a1eb20a353097bfbbf6f961fdfcb3e27e420fbd394
font_01_sfnt_off0000e538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE538 12716 bytes
SHA-256: a1375a9fcacc5c17c4a31dfd103cc6e97c3008cf89d832cc08cfead403601e5b

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