Malicious PDF — malware analysis report

Static analysis result for SHA-256 964f3ec3b0d69457…

MALICIOUS

PDF

70.9 KB Created: 2021-03-02 12:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9f089067477b4df3b37fac1e720e0cf7 SHA-1: 8fbbf97984b2230703774bfafd0a7e6cf013f24a SHA-256: 964f3ec3b0d69457d6bfb9775b6e24977392041c5b45da76c589ce06590d56b4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://soxebez.ru/wix?keyword=gopro+session+user+guide PDF link annotation
    • https://cdn.sqhk.co/nadizolobe/jjbgjqO/word_search_english_with_dictionary.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/fopopulubo.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/jarutozed.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/iuigZHQ/boo_app_without_watermark_download.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/geKigjr/arctic_wolf_wallpapers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jonatabofozepov.epizy.com/96137252846.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/louis_armstrong_sheet_music_trumpet.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/36738811913.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/4162434405.pdfIn PDF document text
    • http://fezozebofafex.rf.gd/38489347685.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/21182889938.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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 4916 bytes
SHA-256: f4489ba019832259bd004c4bf28984d3709b8e3fbed807eaca10e2a55837eddd
font_01_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 13556 bytes
SHA-256: 7e6f7370de60c5e1d6eba9870913a37fa8053d42f3950922587e888f870f0213