Malicious PDF — malware analysis report

Static analysis result for SHA-256 598cd73fff635eb2…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 02:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 608ec3fc14e6582abdb56dbba704c6ff SHA-1: f83b27f99d50bed57181b3ddb76aa1e5d6408c60 SHA-256: 598cd73fff635eb201f4af5c83e2d9ea3a2cdd3b0a0ad32800f0b77ade254770
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://seumenha.ru/wix?keyword=toyota+prius+manual+2013 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370275/normal_6002e5c616bbe.pdfIn PDF document text
    • http://favanitum.iblogger.org/lexunazisukovetilevodokid.pdfIn PDF document text
    • https://kudezugomolalu.weebly.com/uploads/1/3/5/3/135331411/3276239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_6023e1291758c.pdfIn PDF document text
    • http://minilikaru.iblogger.org/8951825885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403263/normal_5fcbeb4063874.pdfIn PDF document text
    • https://cdn.sqhk.co/katafojedul/iNijicg/good_basketball_shooter_quotes.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/2bc70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374980/normal_5ff5b84193e4e.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/128c07472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fd88ff793f9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446260/normal_6005eeb6f0c2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fc84fe1eb4b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_6009797d2ad2e.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwumizebawekez.epizy.com/filmic_pro_user_manual.pdfIn PDF document text
    • http://bavidoripo.epizy.com/ancient_egypt_terminology_crossword_puzzle_answer_key.pdfIn PDF document text
    • http://rabopusafat.epizy.com/5th_grade_math_minutes_answer_key.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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 1856 bytes
SHA-256: fdb263c217760de2518c0f756579dc9dee8f2d982708a62654372d3f07ab4b04
font_01_sfnt_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 5504 bytes
SHA-256: fcf434d4a3f9d4504303513272bd5ce68ae2ec03773d6bb7a87e20f1b12a62c2
font_02_sfnt_off0000f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 10204 bytes
SHA-256: ec66ee297fad3c611d7d4fa2529d5e91379eb5c8b2bd02a38a80441bad0e6ab3

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