Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c302b4b44354983…

MALICIOUS

PDF

67.5 KB Created: 2021-02-15 09:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f36ccbd91d54df0f1d854f68f5832894 SHA-1: 8875675c92c343a9163d99d9e253406a883fa2db SHA-256: 1c302b4b44354983af5579239182b0e769f1a1036233a96072b03b4b8f00b08b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=word%20report%20cover%20page%20template PDF link annotation
    • https://cdn.sqhk.co/xataruzepape/evjbZhw/gia_son_samurai_2k04.pdfIn PDF document text
    • http://stixlife.info/momuputajifepojesofisnhtm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5feb7b21bd982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5fe890369530d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_6023b7d41bee1.pdfIn PDF document text
    • http://ita-bio.fun/xavixigazizujeronovarp6he9.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/naxukobaraxa_nudesix_rogej_genix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459939/normal_5fdd317536697.pdfIn PDF document text
    • https://fukoroxovelamos.weebly.com/uploads/1/3/0/7/130776486/7221974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408333/normal_60039f902527a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5fcaaa13c25ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501212/normal_5ff9d11f7576f.pdfIn PDF document text
    • https://naruvoraxosu.weebly.com/uploads/1/3/0/8/130873998/lidekaki_bagaleve_vovagaxom_komukomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fee71c147f36.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/ihNidhb/farming_jobs_near_me_covid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 5288 bytes
SHA-256: 51adc92dcdbf7477fe1d0c9ff53b15d117d7e9f6cc8e55e22591d7599209c4c2
font_01_sfnt_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 10264 bytes
SHA-256: 3dd23f5cd979676093571bdc6af96cb4e8e6c0dc3682e41746c444ed90fec3e7

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