Malicious PDF — malware analysis report

Static analysis result for SHA-256 248ef0f9808de801…

MALICIOUS

PDF

71.8 KB Created: 2021-02-19 06:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9b4d0df69ad6f29f69b7fe101c976165 SHA-1: 0698b17d46c0fb75184ab5da6735221dfc4af579 SHA-256: 248ef0f9808de801d10b418f0d5c186381262411469c2422344a879b78f1bd94
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/wix?keyword=icis+2020+submission PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5ff07bdd9ccc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fcc07c011981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_601a418924314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468837/normal_5fe0ef4897038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393916/normal_60085a787bbd3.pdfIn PDF document text
    • http://lbaranaydin.com/cyborg_009_anime_1979m2j76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455914/normal_5ff04304e5952.pdfIn PDF document text
    • http://lemurezagamu.iblogger.org/arma_3_full_free.pdfIn PDF document text
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/rawevulilunirojiz.pdfIn PDF document text
    • http://gejewumonew.22web.org/html_css_table_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dakunexafabeve.epizy.com/6718848248.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/beany_block_drainage_design_guide.pdfIn PDF document text
    • http://guneginumo.rf.gd/railway_reservation_form_2018.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/icomania_level_15_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD214 4640 bytes
SHA-256: b497ada0b9a77afdfeaab5df7a19533f9cea37cce5f68826b1110f0586dcbc3c
font_01_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 10244 bytes
SHA-256: 00c054a4de6a37d6317272c247eec956ebde7f304ddd64b7d3ee2757572a0546
font_02_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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