Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79fe38a38162ae1…

MALICIOUS

PDF

39.8 KB Created: 2020-11-01 19:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5f241e7b10d392d7baac218e8631453d SHA-1: 7befa66be4b218c66874e90ec8ff037dd2b63b83 SHA-256: a79fe38a38162ae1876e2cd80ac0ff6024a8e4ac3b20d4c4ec33c31a30ae4fb1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=what+is+ppg-14+butyl+ether In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/wobewemolopus_xexudemaxajik_jakovusiw_gavebelaru.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/6034506.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/gosiwadoluso_niwikuxaji.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/1/0479/2670/6343/files/open_android_studio_terminal_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jefawepusil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9616/5534/files/ancestors_legacy_viking_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd148d64-8711-426c-8e69-fd231d962733/21412828541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5222/6472/files/lukigosunafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6003/1399/files/luramubetujenuxek.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/unexpected_store_exception_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8d620e-0a61-41b4-8015-e810291e224a/lunoxasiziwuv.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_off00005b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B68 5508 bytes
SHA-256: 2a4a5daf941d11110f156d559dd1346778818a9895f917c4a6e85208de5a01ab
font_01_sfnt_off00006e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E43 10780 bytes
SHA-256: 5ca6705c5cc1f73725c031151b25ab8b256b0e7e722592032407bf6d0987dd51