Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0595bb57d8d87e5…

MALICIOUS

PDF

70.7 KB Created: 2020-12-30 03:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4d17fa134f7486b6ed682411d0dc5639 SHA-1: 71ee7cac109e4860686260f33efc64f9c322ebff SHA-256: b0595bb57d8d87e5837e430a07efe0593c4f203315db8aa099355f0747cae1c8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru', disguised with a plausible lure related to 'Long island city high school ceeb code'. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of a malicious URL and the phishing-related heuristics strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/123?utm_term=long+island+city+high+school+ceeb+code In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5fc9a5ca01650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_5fa8856663b3f.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/hbUlhcP/93234360249.pdfIn PDF document text
    • https://cdn.sqhk.co/fujavuraleko/hhhjW4D/faworunimer.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/wizidimawag/24032888581.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/92778750494.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/unusual_architectural_thesis_topics.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/dizovowu.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/cahier_de_vacances_francais_5eme.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/bokekedajebenazupe.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/kizudatisub.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/design_cycle_image.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/vodetomelakofatejubamiri.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/saudi_arabia_visa_application_form_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/revista_cero_en_conducta_numero_53.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/worksheet_in_periodic_table_of_elements.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_off0000d760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 5288 bytes
SHA-256: 18793f5cc9febb263a14210405a74b8a79a7dd0d23f1c26fc0929814f1ec4a00
font_01_sfnt_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 10712 bytes
SHA-256: fdcf6f24a9dc219d58c7810c60e1b339872ecad917055d88cfbd252336c56c0f

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