Malicious PDF — malware analysis report

Static analysis result for SHA-256 d644bcaeddb062a0…

MALICIOUS

PDF

95.2 KB Created: 2021-03-23 03:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: beae761c02a29555a5d65759356c1964 SHA-1: 5866aa9cf202dd7826465bd9f396776d2f658867 SHA-256: d644bcaeddb062a03156878269364ed27d64599caaba086e1990ab61ccc09629
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to SEO-optimized PDF hosting sites, with a primary redirector URL identified as a high-risk indicator. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and linked content indicate a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=5+finger+retell PDF link annotation
    • https://s3.amazonaws.com/zalomi/roronuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/jikuluwegozo.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/vogojef.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/6b76b42.pdfIn PDF document text
    • http://steblin.pro/annapurna_trekking_mapzsisq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_605406a73e6da.pdfIn PDF document text
    • https://xunimolozabipos.weebly.com/uploads/1/3/2/6/132681728/ebc8a449212dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_60592920b791c.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/cabbage_plant_pictures_free.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/19833819574.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/teaching_literacy_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/whatsapp_business_for_iphone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/80108986531.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/naxetonivudzzm84.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/is_papa_johns_gluten_free_crust_keto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_6b7cc9c8ce2d47e8b786ce4671e277a7.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_3ee629504298416990fb0a3e847b8087.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 6676 bytes
SHA-256: 8c7d19c5f97f84c488b30f3d1e2415ab561a2bff7dbc97f4405e82db792a7af7
font_01_sfnt_off00012117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12117 4576 bytes
SHA-256: 08db3bda4793def22f7cf2c73e965c52a99c32b2efdd704e3ee01c70f34c1f2a
font_02_sfnt_off000130bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BF 12136 bytes
SHA-256: 0cc3aa33b9b312f40106bb639ae66df29892d51e4807b829635c32936200f43a
font_03_sfnt_off00015a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A54 16120 bytes
SHA-256: c286ae503dbb916287c5e5a2e442390a905efca754cab290eeee8b305ba17365