Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff788fad18ab34b…

MALICIOUS

PDF

74.1 KB Created: 2021-02-28 16:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 92caa88a048e483f8e9afe59b677f494 SHA-1: f431078dded67ce4e651317d568cc98092577678 SHA-256: aff788fad18ab34b4d624cb9c70bc408a7bb8a1d56ec054bb8009c51c05ecc20
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 URL that leads to a suspicious domain, likely serving the malicious content. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious nature with educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lozipotod.ru/strik?utm_term=general+reading+comprehension+questions+for+3rd+grade PDF link annotation
    • http://raguvigawak.mypressonline.com/wofofagaribiwelopi.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/7249954223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_6033ece7717d8.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/79570129402.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/toro_lx425_manual.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/70890878654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460060/normal_6001e90436910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_5fd3419a9b2f6.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/gudadewajo.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/gixawetopoli/endless_love_imdb_parents_guide.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/38010856090.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/78070069050.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/63982218673.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/visorajigunu.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/lisedakizilobovaj.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/barexoduzogajugabisuboxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/950831793.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/nejosepetofakufibuge.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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5888 bytes
SHA-256: db16dada57f364cb5be38c29f0235ee4bdac049224a0c6525c7c334e1c61b917
font_01_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 10312 bytes
SHA-256: 40bfbdeb60ba8ef5286f3554396812f5ed7b6a6314acd8efe5ca06f16a05f2e8

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