Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d5a6e1d93a978c…

MALICIOUS

PDF

73.8 KB Created: 2021-01-30 05:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: aba8e72f6215bb6b42889b5a3a052923 SHA-1: 94448da5e812c3b11c1fc2a93d5ca71b228bf2fa SHA-256: 13d5a6e1d93a978ce0276b4f44bf75d86f65d9a3eefc93df1f3c71bfbf5f6320
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://leonvi.ru/wb?keyword=las%20vegas%20city%20guide PDF link annotation
    • http://about-central.com/73554831120hccc6.pdfIn PDF document text
    • http://profaudit32.ru/cdma_tool_dfs_professional_softwarer7lli.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/hhGicgj/67673214727.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/gcJjj7i/frogger_2_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/qj7zjaE/quantos_pontos_vale_um_touchdown.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/2e70a72c9ce3be1.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/JhftjjE/39271421766.pdfIn PDF document text
    • https://cdn.sqhk.co/dagidomu/bihG5ja/recorder_notes_with_letters.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/ieie9gc/total_conquest_hack_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_600e404c3d771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5ff7c8a9ec8c1.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/yjghejg/fonojena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401723/normal_5ffff7ac67fc3.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/wanasuvedigo/modern_calligraphy_alphabet_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/canon_eos_rebel_t5_dslr_manual.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_off0000e20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 5080 bytes
SHA-256: 7f95c793860e0fd131d1ada474cee668d85e3022374ed595e1ac1fc14df7ec91
font_01_sfnt_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 11648 bytes
SHA-256: b8ae1fcf199dcadfd4d1346605ec375b4d80e6edef5df79d4f0d683811cb5ee4