Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3920c56a85b9e9e…

MALICIOUS

PDF

67.9 KB Created: 2021-02-22 02:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7f1c35ebddf048bd627aba1fe9e22f13 SHA-1: 55ecd0799496a5bbc8c40de83b4c503c5d6eea97 SHA-256: e3920c56a85b9e9e73539ce123c986661e455d1ecdcb8ff8a529406bad4256ff
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://druttle.ru/wix?keyword=39+clues+cahills+vs+vespers+book+3+pdf PDF link annotation
    • https://cdn.sqhk.co/sitosuduf/eTFvsK2/sogajikawug.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/rjjhfYk/tuwunasalezisozidafixulub.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/Yfhjijj/kowuzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473432/normal_5ffa4d90888e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fc655fa82e1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381302/normal_5fd04582ddbca.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/hiiguiN/81691312588.pdfIn PDF document text
    • https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/nunibonalu.pdfIn PDF document text
    • https://koburuwojut.weebly.com/uploads/1/3/1/3/131378968/1ec806c9477e285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5fd762c5e44e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_602cdeee5da05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5ff5dacc76391.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/tigovatolis/8230420695.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/after_effect_character_animation_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/song_lyrics_ed_sheeran_castle_on_the_hill.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/citizen_skyhawk_blue_angels_titanium.pdfIn PDF document text
    • http://sovezogodum.rf.gd/32008839617.pdfIn PDF document text
    • http://zopefunexot.epizy.com/thala_ajith_viswasam_movie.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_off0000c9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CF 5732 bytes
SHA-256: 68e2b1bf2cc796d7707e64125867c60d4fd758ba7f0973afc0428d3d36833bd2
font_01_sfnt_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 10424 bytes
SHA-256: 4411eeb35b5c821d567a4867b54603c0a4abaf0c14c0d25a82918ea0bd2e2db6

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