Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e1966aa1b855d2…

MALICIOUS

PDF

43.8 KB Created: 2020-10-01 07:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 03e83a1d997204ef7a3676edcc059deb SHA-1: deefb9c4dfccbe9d57cf62430df0b3d2425de8bc SHA-256: a3e1966aa1b855d247a08b5acbeebb67ec5599aa49d82dd89e6292fa3a2aa5d8
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://cctraff.ru/strik?keyword=free+pdf+converter+online+to+jpg In PDF document text
    • http://pevajole.wolfcitydesign.com/uploads/1/3/1/3/131383510/2804353.pdfIn PDF document text
    • http://files.pressserviceinternational.org/uploads/1/3/1/3/131383771/1d6e5.pdfIn PDF document text
    • http://files.becueofficial.com/uploads/1/3/0/8/130874468/071cfb57.pdfIn PDF document text
    • http://files.halfpintlabs.com/uploads/1/3/0/7/130775604/2174035.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/mituko.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/nogokasakogafaxojujig.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/14307b28-869a-4c83-a9a7-bfbf8f44196b/8689190391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52186a17-c1b4-474c-942a-f862e991fe6b/xukutunixuromezudusasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b808ff-8060-483b-a48c-8a38e5216502/32640774143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e0e940-98c8-4b0e-84bc-1dc684e09f78/55786926257.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_off00006e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 5024 bytes
SHA-256: 00986e13406d074b6e0e5de6041a999ff1abe2201911208276422f73a43ce5c5
font_01_sfnt_off00007fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD2 10264 bytes
SHA-256: 5021df34c2317db3d11e23847cdd5dd14bccc25548d0f506cc14a38adb8bab0f