Malicious PDF — malware analysis report

Static analysis result for SHA-256 221db4026ce4892d…

MALICIOUS

PDF

72.9 KB Created: 2021-02-05 18:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: edbb1549ebb5a3ee36cff58d559a9f7e SHA-1: 1e00842792eba19084143c69abea3b2e0957e54a SHA-256: 221db4026ce4892ddabd84746095092023c1b9fbbdcffc1356fc05be18876331
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://baarspo.ru/wb?keyword=online%20shopping%20cart%20software%20free PDF link annotation
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/vibum.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/kowos.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/9162717.pdfIn PDF document text
    • http://waystep.site/enter_records_esl_playlistm4fgl.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/zegoneluge.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/wigilakufulelojevuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5feb4f72da1d2.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/836100886ubouf.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/31746ebd6.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/7f3f2.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/pulujolatepuv/vozegirilux.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/47239655844.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/iphone_11_android_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/33695460361.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/71578552900.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/cerebral_arteriovenous_malformations_detection.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/ledibexu.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/capitulo_5a_vocabulary_flashcards_sheet_1_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 5396 bytes
SHA-256: 1d89343efa3afb065f039378ac4c167259def2d233d94c0c86114196f6d7882c
font_01_sfnt_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 10964 bytes
SHA-256: b5bdf30309a927c95482f8b714e673b8ba25205f0f6c527c05b267f1780751d0

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