Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd8947a942abd83…

MALICIOUS

PDF

74.5 KB Created: 2021-02-16 08:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3da5a87b09fed303f014d24f30951dd1 SHA-1: a9acf13f97e70c87182fd7597cc89de223cb3d6c SHA-256: 0fd8947a942abd83ff1604724fe102dee352a9d9a6fa3dcf09ac5f04e0ab0ee2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious nature with educational content.

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://seumenha.ru/strik?utm_term=subject+and+predicate+worksheets+with+answers+for+grade+6 PDF link annotation
    • http://kukikifo.iblogger.org/retefatidus.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/gnyEpgf/mewimifijovipariv.pdfIn PDF document text
    • https://cdn.sqhk.co/wovedajuraki/Aijihja/85301777030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_5fdbccfde38f2.pdfIn PDF document text
    • http://creamwalls.online/dapoxijesufo5773l.pdfIn PDF document text
    • http://whysmall.space/catch_wrestling_techniquesk2g6k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fcc0d85043a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fd1a5c684122.pdfIn PDF document text
    • http://wersita.fun/62897910390bjhr2.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/xurixado/coelom_formation_in_frog.pdfIn PDF document text
    • http://vurisadazuxe.epizy.com/analysis_services_free.pdfIn PDF document text
    • http://sosujogi.epizy.com/somok.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/25354011311.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/website_offline_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/86216552296.pdfIn PDF document text
    • http://pomigipasa.epizy.com/woxavemov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD938 2940 bytes
SHA-256: 98626d7e946c09f9c239f2fa3d396c2da29ca55acac7f7566b4f25ec4811e40e
font_01_sfnt_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 6016 bytes
SHA-256: 40f6060e137b3c54abc7f9515c9f24d23b44cea453acf351d43ebe3c574426a4
font_02_sfnt_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 10556 bytes
SHA-256: 66db8e2b0233dd20abcd0bb7f4e69ee239519cf35fa24abdc6763604faa6ffdc

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