Malicious PDF — malware analysis report

Static analysis result for SHA-256 458f562fa4c4e451…

MALICIOUS

PDF

69.9 KB Created: 2021-02-15 03:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 261dcf280cb31c3f8128ba47944ec8b7 SHA-1: 4fc27a364df55241aebbbef345c47be2d7ba7c71 SHA-256: 458f562fa4c4e451645598daffb024d9e19e7b767b658d0965639aa6b0134128
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://druttle.ru/wix?keyword=king+arthur+worksheet+answers PDF link annotation
    • http://afterdealer.pro/nififudenutagolitasusowijf1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_6017a73bbea01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_6026aa10a4e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_600c9e2a4b237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5fdeb59dd382c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_6000052b0d884.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/jukotae0fq4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_60176dd95f194.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444626/normal_5fcb5f6c1d43a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_601dc9838b70d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_60243c8c654a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_601dbe87aa215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fc96d0cc0f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_600ae6e82a04c.pdfIn PDF document text
    • http://harmony-market.ru/57865154612tgrrb.pdfIn PDF document text
    • http://picsonair.com/emotionally_healthy_spirituality_bookq4cmi.pdfIn PDF document text
    • https://kuximakid.weebly.com/uploads/1/3/0/7/130739256/masifazij.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
    • 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_off0000c74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74B 4924 bytes
SHA-256: 8bb9d7bb333d16b64553c13775fe5d8f01fd705d1315f10938d96d8975578260
font_01_sfnt_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 10580 bytes
SHA-256: b4c60d6db3a0fe0c96f5886b75cef54b50d11df5f9a6ec32e9c3e5009ac2d74a
font_02_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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