Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4ac4fd45754cf1…

MALICIOUS

PDF

45.1 KB Created: 2020-10-10 17:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dd7a85c2f348a8c31f4293338a9b0fdb SHA-1: 67beda447b4b45d791c5f7021356738ff0781479 SHA-256: 3c4ac4fd45754cf1fdf69965ab21880621876f07d58c00b1fc61648142de9b0a
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://gettraff.ru/pify?keyword=geometry+dash+apk+android+10 In PDF document text
    • http://files.itsshawnkombat.net/uploads/1/3/1/4/131452967/nuzimelejulamapebod.pdfIn PDF document text
    • http://files.familiessharinghope.org/uploads/1/3/1/3/131383407/9838006.pdfIn PDF document text
    • http://files.impartalliance.org/uploads/1/3/0/9/130969599/juvakajijavor.pdfIn PDF document text
    • http://files.janetfergusonauthor.com/uploads/1/3/2/6/132681517/pozivojitan_redovaradafafo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/361f2d66-2a17-4bc8-bfc7-8346883aaac8/viwidesat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93517b06-4842-4b22-80bc-ef7a7e1b30d9/ganagizekemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62756210-01c6-405e-933d-d8fd51ed1956/jodepujomoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2993/7566/files/ditexafodivemufijesarede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/8471/9775/files/koroledugikigutaxisivul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8233/7444/files/octuple_compressed_sugarcane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6178/7805/files/bomomaweku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8811/0502/files/41039533499.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5344 bytes
SHA-256: f245cf746a3766eacd4e9c380a9b212632539ba30228069be86b956c3b3c9b04
font_01_sfnt_off000077cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 9804 bytes
SHA-256: 4b5c9e8d41896411e65643f8b9f4f0c52b83d6c4b50d4f9d7d976e39efe3c1a3
font_02_sfnt_off0000995f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230