Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f983c45a85f10e…

MALICIOUS

PDF

77.6 KB Created: 2021-02-15 13:22:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5e4d637b2eb0ea3bda581ad6060f433b SHA-1: b798838c9c43d68a7df15accc73ae64fa03aa143 SHA-256: 90f983c45a85f10ec8794ec13c74c434ee6379617fbff974e02b2d006f8b4af6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as information about appliance repair. This URL is likely intended to lead the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=how+to+reset+delay+on+ge+dishwasher PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393637/normal_601dab481f02c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5fe7dbde61054.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5ff1628516d94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391907/normal_5fe3a0873b88d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fe22f4ca7f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_60057f7198e16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383464/normal_5ff35eab9ec2e.pdfIn PDF document text
    • http://presalle.xyz/22509853651uwte4.pdfIn PDF document text
    • http://xuzejomuxide.22web.org/blackberry_z30_os.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fc66c88c8b71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://masomewux.rf.gd/antutu_3d_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/jipilazesolisufuvi.pdfIn PDF document text
    • http://roruvavaderej.epizy.com/46399400286.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/bigobu.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/sewaweritakoxuzepixez.pdfIn PDF document text
    • http://ragigixo.epizy.com/puzzles_and_riddles_in_maths_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/lirutusojar.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/k_g_f_tamil_movie.pdfIn PDF document text
    • http://visejatuvun.rf.gd/lobad.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_off0000f20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 5240 bytes
SHA-256: 31a4292a59d7ffdcf39a5942fdbd2f5ffe595899dca03bedc6e84d796cf385e8
font_01_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 10964 bytes
SHA-256: 75a893928ceb3bd6d2454d6fff1e551147ec431c84d71d16db18c41b3c51762e

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