Malicious PDF — malware analysis report

Static analysis result for SHA-256 0563fa8b620db6c5…

MALICIOUS

PDF

44.1 KB Created: 2020-09-30 23:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7ddb7493c32ec1736c11a291fafea6d1 SHA-1: 26f5482c29fc519be8404a7a6467be92eed97278 SHA-256: 0563fa8b620db6c5ae6cffd0bee24329976c06f07e6d149dfa5eb77b18758bac
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=ableword+pdf+download In PDF document text
    • http://files.ramar.ca/uploads/1/3/0/9/130969503/joxopi-duxexomu-nosutorepaxutib.pdfIn PDF document text
    • http://narezuwu.westernwilcodemsclub.com/uploads/1/3/1/3/131383483/muwujatazuni.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/c4d12963-4112-4bdd-875e-bdf66229a89a/69180121629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9e4e95-feb6-40b5-ae24-b0eb3aef999e/pozapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d982ca-41a2-4185-bdbf-1192a6119150/fudilexejupuvof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da29ef86-65f4-488c-8681-b55ef2878d55/losiziwofimosorov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c93c954-f773-4c34-ab6d-bd54779843df/11515898519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fe846f-adbb-4684-9da7-9cbcbcab9222/61505433833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8478e6b7-4cc0-4aa8-880d-c1049f4a96bd/bejesegebaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3b846e-4aea-459b-93a4-86d90420764f/59402808550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeef10ed-7ef8-4793-80a9-673e890e0761/fikaxosononuvedil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee6add1-a9e5-4b1c-a332-2868a996c1d1/20518298326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9751e4d3-327e-42c9-914d-24c21ffb4387/pexegogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbae57d-4f56-4012-9db9-5452d52cdef4/93321385949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/822e4e9c-2bca-4aae-aff0-70fc85af7f52/91664876066.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_off00006284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6284 4740 bytes
SHA-256: fa1acb59becfcd2f79760e7fa8c83d9333d7a7a70d4152435bc2f934ccd80b6e
font_01_sfnt_off000072a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A9 10192 bytes
SHA-256: 6622b3fdcc2965bcbaab65b13ee7343f77a8c13642c76188ed5fc54992db7881
font_02_sfnt_off00009582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9582 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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