Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a9527ff24e8544…

MALICIOUS

PDF

66.9 KB Created: 2021-02-15 01:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bab582d2e44bff3c5ae19fc6bd742cca SHA-1: 91553387b5a26aa7ce2ff29acb44d8c8e1bf33e3 SHA-256: b2a9527ff24e8544d118e86cfb0c21fffe1b91e3e6f6647692f08bd3cf654f5a
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://leonvi.ru/wix?keyword=ap+calculus+definition+of+derivative+worksheet PDF link annotation
    • https://cdn.sqhk.co/sadetujadufi/Vihjjji/fine_woodworking_tools_near_me.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/fb25bfaf37.pdfIn PDF document text
    • https://siwetoro.weebly.com/uploads/1/3/0/8/130814297/wojokuzob.pdfIn PDF document text
    • https://votozugilom.weebly.com/uploads/1/3/1/0/131071295/9950056.pdfIn PDF document text
    • https://padixegidenu.weebly.com/uploads/1/3/1/1/131164435/7511927.pdfIn PDF document text
    • https://tenimuleletef.weebly.com/uploads/1/3/4/3/134343202/nunadanisi.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/800b9.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/7638941.pdfIn PDF document text
    • https://cdn.sqhk.co/warugariluxe/xjdggjg/telehealth_services_defined.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fe990d977268.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/tVZmifg/goxolabixoze.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/2063086.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/tofomuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagubip/edwardsville_high_school_illinois_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/29900245882.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/ben_sherman_belt_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/88695442531.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/41950612029.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/staples_5_large_tab_insertable_divider_template.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_off0000cac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC5 5448 bytes
SHA-256: 869f438ab5b4b327111bc2e0fafc6601cfb551bd529aea4ae6ec9cb8603a2eff
font_01_sfnt_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 9612 bytes
SHA-256: c608d606a5cd8c126a37c8f0ec9815b50be4434310a0a74187b9defa0e8f82ab

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