Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cfb4015ed35a3a…

MALICIOUS

PDF

36.5 KB Created: 2020-10-17 13:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d924368485144121c67ba4d7e8894ae0 SHA-1: dd6c6892cfcd3aa93df61455ddeb4630facb2e83 SHA-256: a2cfb4015ed35a3a53c5945b22984bcf7a72081f013093a3d83fae1cb89ee05c
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=derecho+civil+mexicano+rojina+villegas In PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/b9b62e.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/getewir-nanovutu-mivixa.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/pokudekisifanetas.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8a4790ecef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f878f70dbaaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f876504334be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f87f76aa6fc3.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/8a00b308-3752-4825-9918-cba607ba957d/68091503404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0376f4e-2b1a-4393-9e10-b7c8f62ba3c1/taledojusirupeveluvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0cd4323-5418-454f-9de9-7368541fe29a/vefojaxevafinudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97e2bfb-d62e-4a8b-8c49-745b4f09737a/90706365305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32e0331-2137-4634-bf20-7d1e30482aa2/71566615543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234aedf3-6738-4d0c-84c1-96d74a3610c9/43660685037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3d75e9-3595-4441-b14e-8f2c71017836/kesibelamonejomirag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca04634-d988-44c7-acce-2ac067f5b62f/tanim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3181ae0c-22a3-4852-801f-2137ef47abaf/37081579494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7858659-5551-453b-ab51-6444815da343/sawub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0f21d7-7ba5-4abc-a76b-307c35ee38e7/44032747801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd073336-52ac-4023-9f01-15bf6acba032/nojuzijigizopetejok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941491ae-edf3-4752-b7c9-745eac7c60ff/46034473622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7dd64c-3375-4886-b1f1-d311735f1afc/48369215870.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_off00004cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDC 5416 bytes
SHA-256: ac07601f3ed7420bba895d7710b05ece3711f1b06960064201d6ff38e4ddc117
font_01_sfnt_off00005f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 10972 bytes
SHA-256: 1d026e52f624d012a479ea16a3e228fda3a2daf6c9c10506089f825238f7a691