Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d378b265262037…

MALICIOUS

PDF

67.3 KB Created: 2021-02-14 12:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b5841353a978a26cf7d973183ace93aa SHA-1: b25ab7b0a51ff37f63b09206c60e8c5511076e02 SHA-256: d8d378b265262037dc68a16d2201128ca5c291e4133295bf072cce74e9fe8938
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/wix?keyword=la+fitness+st+lucie+west+class+schedule PDF link annotation
    • http://procripton.com/98678038595ypdq7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fdb7ccd8a29c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_600cfc942a9ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5febc761c5fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fe6e09e57d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fd2f68295829.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5ffa3f611d380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5ff53e61a2707.pdfIn PDF document text
    • http://istlan.space/gagavomonatifajajumurovepsegyi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_601889c91ad5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_602459084bdd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://velizufilalate.epizy.com/upsc_2019_online_application_form.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_off0000c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94B 5048 bytes
SHA-256: 8ea2e8506dfcd03d9cde8ac81bbc0aa4d0b109ddaa6dc8b34873a7a721a1e38b
font_01_sfnt_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 10992 bytes
SHA-256: 118c8129662f9e4408c9d0acbd72dab359554e5b3b6018544452f3a1b19c7bf7