Malicious PDF — malware analysis report

Static analysis result for SHA-256 d490248ba49fc7dc…

MALICIOUS

PDF

68.2 KB Created: 2021-02-16 00:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0960653d84e0e44ec1553638a82313c5 SHA-1: 045702f7d5d63b050f8d8261f57103928b7a2959 SHA-256: d490248ba49fc7dca107ed70f064573fc442c5d77be2fef8985ed19e4c1ec80f
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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=alcon+infiniti+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421983/normal_5fecaeca5a7cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_601eddff7f0c5.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/3489002.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/hbm4jds/diet_breakfast_bars.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5fd821b88264d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fde2d891621d.pdfIn PDF document text
    • https://cdn.sqhk.co/xixumobun/jc44gdT/48962738721.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/jniXhfN/tukigubanapakoval.pdfIn PDF document text
    • http://zidefekatekuzip.iblogger.org/dell_precision_t5500_bios_password.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_600fffbfe2f8c.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/Zhz2Dgh/machines_at_war_3_rts_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_60076eddd058e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5ff9287530c4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilovin.epizy.com/albion_silver_making_guide_2019.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_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 5076 bytes
SHA-256: 0ed4cfc91f74d1e5ae0efd5b7f2e8455571de0789dab8a968c5ee9c8a8fe6cd3
font_01_sfnt_off0000dfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 10592 bytes
SHA-256: 75529cae2a2b05adedfe75051f90a68ee61c36924bcf732c2c22f466b76ed66c

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