Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e7054c4a495b16…

MALICIOUS

PDF

65.8 KB Created: 2020-11-22 05:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 09899c8548cc84ef709075968857ddb4 SHA-1: 9a3fbac68741515ec8b4805083e5aaf1b505f287 SHA-256: e5e7054c4a495b164e0b3d9bfa9f56879c8f5366e02607834a3cdea9cca0b5fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to manipulate search engine results or redirect users to potentially harmful sites. The primary URL observed is 'https://trafffi.ru/123?utm_term=extreme+q+vaporizer'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=extreme+q+vaporizer PDF link annotation
    • https://levubitadogu.weebly.com/uploads/1/3/4/7/134727965/403212.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/belijenugebiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f897285883c6.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/fewaram.pdfIn PDF document text
    • https://xesofawerokiju.weebly.com/uploads/1/3/4/3/134356335/36f07.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.pdfIn PDF document text
    • https://zurozudosumo.weebly.com/uploads/1/3/4/7/134719863/7e0978648f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f88bab456afa.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/zoroxov.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/bewibiwat/the_impact_the_printing_press_had_on_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/netikajilanomudo.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/arc_hydro_tools_arcgis_10._5.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/gisesot.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_off0000c4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A2 5016 bytes
SHA-256: 71c254c8ef582c971116e3eb6eeff48f957c844e64ce3250c42262fdab5af5a9
font_01_sfnt_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 10848 bytes
SHA-256: 4abd0c99afeff5dbfcec2c546e1b6b63d47f219d46e9ee7a3dda8db5d4c386dd

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