Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f64d62dcb7b1b35…

MALICIOUS

PDF

72.2 KB Created: 2021-01-12 11:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f5da75b3e1f36039fbd4d3d9be0ba06c SHA-1: ec7d90caf3c78705a034a5ca725a5e47b0953ae3 SHA-256: 9f64d62dcb7b1b35ffa6502d3ad961332069164b6bee3f601819a20e2c78a641
254 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
  • 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.
  • 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/wb?keyword=manual%20cold%20cut%20slicer In PDF document text
    • https://site-1168163.mozfiles.com/files/1168163/noviditoxovudop.pdfIn PDF document text
    • https://site-1171882.mozfiles.com/files/1171882/dofelobotevegejuzokumatuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8c202d40e63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476582/normal_5ff88f4e2e988.pdfIn PDF document text
    • https://site-1178979.mozfiles.com/files/1178979/zumulenaso.pdfIn PDF document text
    • https://zefivevolexu.weebly.com/uploads/1/3/1/6/131637056/e42721f8e.pdfIn PDF document text
    • https://wabanovawufefo.weebly.com/uploads/1/3/4/5/134587397/34625428276fdbd.pdfIn PDF document text
    • https://site-1175610.mozfiles.com/files/1175610/42906746473.pdfIn PDF document text
    • https://xidogofu.weebly.com/uploads/1/3/4/3/134307260/f80325.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/garorowa/answer_to_the_question_42.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/dezakajafidesov.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/wifi_display_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/79127097415.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/33885121842.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/karyotype_worksheet_answers.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_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 4940 bytes
SHA-256: 483fbde2dca2923664053ca15e20f8af262a17c1e24fb2e98c56c816a7a61ee7
font_01_sfnt_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 11228 bytes
SHA-256: 487dd322c1d134543d19b17c3c428f539d15dbb4ec7e4cae959ab7782ff49f43

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