Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e17fec90cba5919…

MALICIOUS

PDF

95.0 KB Created: 2021-01-24 04:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b05333c581de4273f79f3538fc68048c SHA-1: dcbdbb22454928fcba98aa8796609fddf64f0b39 SHA-256: 8e17fec90cba5919b2b55cc2e5774f2b31ae561247633d017aa1d1ff4bff6a81
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to reference software names, suggesting a lure to trick users into clicking the malicious link for a fake download or service.

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
  • 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=bitdefender+antivirus+free++windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fcf7d65a72c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389585/normal_5fcc82630f1eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5fe17ae4c9a41.pdfIn PDF document text
    • https://site-1168299.mozfiles.com/files/1168299/xefojopoxiwimusivusakog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5fc871ee54fe0.pdfIn PDF document text
    • https://site-1192097.mozfiles.com/files/1192097/broken_arrow_golf_course.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_6004122a28a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_600cb3cb2f39a.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/kodipopujufipig/black_widow_movie_in_tamilyogi.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/70490096963.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/36471660594.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/numerical_simulation_in_molecular_dynamics.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/agrochemicals_agrimoon.pdfIn PDF document text
    • http://vipiwimepi.epizy.com/26432629773.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/45547834803.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/78529684017.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_off000137e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E9 5264 bytes
SHA-256: 244483b7c1028b8ab65789da66c3883db8eb6ab52af20fc7f977ebd7b34438f1
font_01_sfnt_off000149ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FF 10688 bytes
SHA-256: 5251eec9e656b8267924e81441eb43a7788b8c11cc34cea22614c0595d789151

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