Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de630284f3a50d8…

MALICIOUS

PDF

39.6 KB Created: 2020-10-09 18:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3bc15b94e63c2ef0dd50bcd713ab353b SHA-1: ac0c833b6f77e3e9aae1687e39338e16540db27f SHA-256: 2de630284f3a50d8a6c6d8f5da5675e5747dd4044dbe6b55aef554c084dd0f90
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=space+saver+microwave+convection+oven In PDF document text
    • http://fopijifol.faubionchoir.com/uploads/1/3/0/7/130739416/nafevubatotuma_fesolizisorerig_bunoper_wufofo.pdfIn PDF document text
    • http://zopep.anaffairtoremember1.com/uploads/1/3/0/8/130874683/fixazu_rakeluvifipidit.pdfIn PDF document text
    • http://files.insightenergy.ca/uploads/1/3/1/3/131398064/disesokime_lonux.pdfIn PDF document text
    • http://files.hug-podcastnetwork.com/uploads/1/3/1/4/131407711/junixesedapugas.pdfIn PDF document text
    • http://pomafutep.stgeorgemn.org/uploads/1/3/0/7/130775045/644418.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/85bdd451-29d6-42fd-a88c-99814e73cd57/86486053598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6dbcfb-0655-47e3-ac89-80c77ec9e19d/75065060959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47643e51-486e-4f5d-877b-3fb8fc2d11cd/24945182114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c0ebdc-2715-4128-9c5c-3ce20786900c/53993012886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92025e3-6c44-40b2-aa35-9e8b86c138df/73638390003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67729ed8-7671-4937-a82f-c3d7d8492ad8/kefinibuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4080be8-78a4-457b-97e3-3707371a2c9b/luvitudewazironofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83498435-15e4-4843-a794-92f7f7fc7616/bunulabilefan.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_off00005d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D65 5304 bytes
SHA-256: 717fba2983b9e3a2ec7a743aa007e0243fd725d1311137ba39bfea018f0bd955
font_01_sfnt_off00006f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6F 10052 bytes
SHA-256: c1a1a7f78aee23bec3b6c23e1c546cd1015ca401fe8f430d5b77b820f8d274f0

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