Malicious PDF — malware analysis report

Static analysis result for SHA-256 5077f88940f01b4c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-13 20:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 213d7d306a6f0e6ff508c33eb0a1b646 SHA-1: 3d42a14f71a75d62bbe0d154cb90e62a909dab90 SHA-256: 5077f88940f01b4c56307ce0e2de37f4f346de7c6a058c88174f1fa6c5769ae6
236 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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=3.3.5+jewelcrafting+guide PDF link annotation
    • https://cdn.sqhk.co/duxadikoti/LgdhewX/gravity_jump_data.pdfIn PDF document text
    • http://loginwithfb.site/kivobawizazelag634j1.pdfIn PDF document text
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/sekenun.pdfIn PDF document text
    • http://universal-kirov.ru/kejozobao6w08.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/jz1jnTm/red_ball_100.pdfIn PDF document text
    • https://fegenogo.weebly.com/uploads/1/3/5/9/135981842/senagexoketomiw.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/xedokutojip-zevolakobej-sanivane.pdfIn PDF document text
    • https://vixoketos.weebly.com/uploads/1/3/1/4/131453026/1167354.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/varoximu/book_manager_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/nuzapirakutewedolak.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/fenufapufemabibifada.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/97047433922.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/vuvowepafixedotuwuluk.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/34184716160.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_off0000ce15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE15 5404 bytes
SHA-256: 5fc89dae57a17986e31e5f39e2a3a3d102daaab4d8a149b49a58ea6e2ba09c65
font_01_sfnt_off0000e0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A7 10436 bytes
SHA-256: a2d83c64af3ba989643ceb96ec11e48839ef4c6c52709e76fd2bfeeed1c884c1

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