Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41d78a231f9d68a…

MALICIOUS

PDF

68.1 KB Created: 2021-01-01 07:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9699912645935300010af05f0b296b02 SHA-1: d0d08c66579edf2bdf858c80d68f7c393ab64959 SHA-256: c41d78a231f9d68a8bb92957d5d1d809084d6078044cc8e71fece9dd383068a1
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/aws?utm_term=lucina+guide+smash PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tezude/korivetadiliver.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/xexibodaxefewejowufixoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1f8c4b-c185-4a5b-a576-b3c54fb0668d/aaja_sanam_madhur_chandni_mein_hum_s.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/pijafifovepoketidij.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/71766238594.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/ielts_writing_task_2_template.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/31506586101.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/badabevimibexiwigeda.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/kagefotamunuvuwuwem.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/52874882525.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/27554808845.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_off0000d059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD059 5164 bytes
SHA-256: 8522c80554ee55d69a5b7a6dacdbe2ee231573f01f4b6262d827f23c3645a8ca
font_01_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 10076 bytes
SHA-256: 2eae669b717f028c0f7e346379018182e98e3fe1cc3970653871d7381c7c8148

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