Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc559165709a6965…

MALICIOUS

PDF

63.4 KB Created: 2021-02-21 09:38:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: be48b07aa78b3ea38ad00c38000f1b98 SHA-1: 96dcb4eaca67d14a25e8e6a3a3ff39b5a0550241 SHA-256: dc559165709a6965bde3c986b3e659fa75a25c5724ef74e04d14cce2862dd015
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The embedded URLs and the PDF structure suggest an attempt to redirect users to malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the extensive link farm indicates a strong intent to lead users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://seumenha.ru/wix?keyword=frisco+isd+prom+dates+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391317/normal_60218947af324.pdfIn PDF document text
    • http://pogadai.xyz/anker_20000_pd_manualgji6m.pdfIn PDF document text
    • https://xuxedujuwa.weebly.com/uploads/1/3/5/3/135345360/zimonidakoritu-muzuxo-getupagimabeba-xomigepefako.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/xusajudisileso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500667/normal_5ff16d6bc9ce9.pdfIn PDF document text
    • https://cdn.sqhk.co/lazodadevab/gjicGif/pekuzepuxezapaxaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5ffc9911e8fc5.pdfIn PDF document text
    • http://outputqwvk.space/tabijumeviziwixaramo7gjr1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460460/normal_5fdf597e9bb04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fedde9adc32b.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/e09a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450356/normal_5fcc09c4255a2.pdfIn PDF document text
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/7149531.pdfIn PDF document text
    • http://vuzopozakobepe.22web.org/asvab_study_guide_2019_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rulenanevatetid.epizy.com/online_business_ideas_2018.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_off0000bd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD89 5416 bytes
SHA-256: 8cc6e57a5613e97943a6bfc5277018cf7dccd46aed36024267552e27a37d720a
font_01_sfnt_off0000cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDB 9672 bytes
SHA-256: a29e310cdf401e0169ef5ee38d2330989c3965dcee924bcfa1a2970dd82de2c1

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