Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafb5785cda9c1ac…

MALICIOUS

PDF

62.3 KB Created: 2021-02-13 16:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 27d75d73d4b4dfe5d3b212c2ccf76323 SHA-1: 8ef3ddaaf6f40c1e0606c732fd0c4703cd88d6c4 SHA-256: aafb5785cda9c1ac982bafd853e03283ababd386a6fdf00480cb3526914f01f9
194 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
  • 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://yafferge.ru/wb?keyword=alveolitis%20dental%20tratamiento%20pdf In PDF document text
    • http://lnstagramcopyrightcenter.com/keganumerx03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5ff28658f0785.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/vazidataxegogew.pdfIn PDF document text
    • http://knitfqph.site/suwisegegizexuneto5c05g.pdfIn PDF document text
    • https://gevivefopunuxaf.weebly.com/uploads/1/3/4/3/134331765/xifipugorosofedisuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_60054bc20f3cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_600de40d98a67.pdfIn PDF document text
    • http://ledimpress.biz/percentage_change_calculator_uk37oi8.pdfIn PDF document text
    • http://clubstore.pro/nadra_kiosk_cmsedk3t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_6018c8a125f9d.pdfIn PDF document text
    • http://baffer-shop.space/disneyland_droid_depot_appmrv4v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fccb84a0c834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425504/normal_600272452ef9f.pdfIn PDF document text
    • https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/5626052df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_6026a11c110e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_60237e9b64e26.pdfIn PDF document text
    • https://funexoxep.weebly.com/uploads/1/3/2/3/132303151/149943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebigibozudival.epizy.com/47400458492.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_off0000b89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89C 5236 bytes
SHA-256: 2a55448f32b2d5f1a1a59c73064856e5dfeca41fdb20bc29ddff35a59df5a8aa
font_01_sfnt_off0000ca5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5E 9804 bytes
SHA-256: 95b28b817f1085a43e303065e49c85187834bb61e15459be28b2085d166468ef

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