Malicious PDF — malware analysis report

Static analysis result for SHA-256 771955f2f5c9f4af…

MALICIOUS

PDF

65.6 KB Created: 2021-02-12 18:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a24c79095a3c1058e879c2f71028ed44 SHA-1: 3302564276cf1c6183e5ef7af11ad8de6b91c823 SHA-256: 771955f2f5c9f4afc5e1c1728b2a481b1fe256cb1fdec77c3e4fc8cc95418351
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=song+song+divorce+news PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495837/normal_5fd0ffa2db66d.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/kR7geja/srs_close_protection.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/cz5dhcj/68618774793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_601b8c4608ccd.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/tzhdOji/betakemotitamowos.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/gE9ifjc/huawei_health_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/RheW4ib/v-_models_for_interdisciplinary_systems_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/hgggmpu/gimikulalasobez.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/jchdHjg/walking_dead_season_10_episode_16_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_5ff70c7d61131.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
    • https://s3.amazonaws.com/viwoxuz/vutesegazinuwozixamutuva.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/dufur.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/tovelipufamunamuveva.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_off0000b782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB782 4828 bytes
SHA-256: 5a6b502241a24009969b3b7705bda99900dcbc2be998aea620f405b7dc87acc2
font_01_sfnt_off0000c7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F3 10340 bytes
SHA-256: bb7180b66a6308ef21b19201ac06e0d7671ffdaf186f1ed87008f529813fa779
font_02_sfnt_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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