Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8df29bf27caa87a…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 11:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e39c4e75dca5ebff8a967a86237fa0d7 SHA-1: d37b957211385d7f5dc1161166218eb8440cf75e SHA-256: f8df29bf27caa87a109c48b9f0e82de8885186d50d9632f9b546deb8d706d441
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=reddit+summoners+war+code+2020 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fe32d5a99a8b.pdfIn PDF document text
    • https://lufurazorume.weebly.com/uploads/1/3/0/8/130874109/7573937.pdfIn PDF document text
    • https://cdn.sqhk.co/kutogudofi/ijqLJEa/strategy_design_pattern_golang.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_602204791fd43.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/cC5opgj/wood_projects_that_sell_well.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5fc7b2bacdd65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_60006f3b44338.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/7714038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5ff53a5e165ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5ffa18a15153c.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/zepipow-bemipew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_6028620f498e9.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/5ogjfxs/smithsonian_channel_schedule_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/bEjby2B/fallout_wasteland_warfare_cards.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC5 5424 bytes
SHA-256: 111b72da90bf48b3c0fe1b151f61d59c96dfb567967a5d36aa77e95f688dfcef
font_01_sfnt_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 10768 bytes
SHA-256: 6b7b0b14b77f848394d3ac42074e65f8a2937bbc3e99b4fa1a4668ac943fb5c9