Malicious PDF — malware analysis report

Static analysis result for SHA-256 3942c6a11e73ad1d…

MALICIOUS

PDF

67.5 KB Created: 2021-02-23 21:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 974f31821649d3f4433f6141d1dbdeae SHA-1: bc7f32424849dbfcad806d0a1680c47524fa970d SHA-256: 3942c6a11e73ad1d2fa40087074afeb9186bc2d40641df9edacf0eff9d8e9c2f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=basic+tools+of+geometry+word+search+answer+key PDF link annotation
    • https://nizidisifa.weebly.com/uploads/1/3/4/5/134505067/xilulofenulomef-pujizilosajoput-mevezudex.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/GPiijja/nipepunojitaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/7yY4hiZ/farezugovowadunowoma.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/uaSjfic/defy_gravity_prices_durham.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd1f23c0ebb0.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/fgddPV0/us_canada_border_crossings_open.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_6014d1a961dc2.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/rudokotuwitepen-gakarazazi-pulajezamavav.pdfIn PDF document text
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/1317431.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/ZZhbjdt/6590835191.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/jc4xaXV/80_slow_songs_hits.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/negofazok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_601309c429d1d.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/5f2e03bace7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382620/normal_60000e38a51e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5fe0a717c67d7.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_off0000c9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DA 5740 bytes
SHA-256: 6d1bd44e35b0ac4fb8d4b645d5a71d7960c8ee761c0d4ff4ef4cd79c9e9cd3c8
font_01_sfnt_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 10596 bytes
SHA-256: 917ef4a5681d8230812cab5465df81902e64010e62d3ac0d5d56195f7602b842

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