Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46d1d4019e81134…

MALICIOUS

PDF

65.6 KB Created: 2021-02-08 08:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5479cb519909b0f0dec93c6748b3dff1 SHA-1: 890996cc90af66b19380ce632f9f44df57bf3d23 SHA-256: e46d1d4019e811342e6100903fdc1de5497b8312f4b7a151e31195b8dad70e78
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a malicious intent to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious content, likely a trojan or phishing lure.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/aws?utm_term=adding+and+subtracting+fractions+worksheet+ks1 PDF link annotation
    • http://xudiremomikuxe.iblogger.org/35302374997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_6005b728c14f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_600b6a5b96184.pdfIn PDF document text
    • https://zizovelet.weebly.com/uploads/1/3/1/3/131380569/6753196.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495988/normal_5fedf40c02336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_601dd73735751.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/3462571.pdfIn PDF document text
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/kemedas_dawepataz_gixalakexom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5ffbeb969ccd0.pdfIn PDF document text
    • http://buzatukati.iblogger.org/persuasive_language_ethos_pathos_logos_worksheet.pdfIn PDF document text
    • http://cadenalia.com/94790123641enqe6.pdfIn PDF document text
    • http://liketime.fun/3689495871iwj1j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_60191e57372fb.pdfIn PDF document text
    • http://zesamoa.online/black_friday_2019_amazon_firen714h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gatakokuto.rf.gd/fusion_360_free_trial.pdfIn PDF document text
    • http://kukatunudivolu.epizy.com/31004540993.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_off0000c29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29E 5588 bytes
SHA-256: 928b394af8345395e733f7ac9c029ce61c5c14e47f2fdb30daff8dda19aecd5e
font_01_sfnt_off0000d5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B6 10332 bytes
SHA-256: 9a72a14dd89775a57df3fd05abdd9de441e09409986a5f8ef6c1f34eb6c2b9f5

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