Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4533386040128b…

MALICIOUS

PDF

108.4 KB Created: 2021-02-16 19:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: de84cbea9c09b4716648e679f43f1b22 SHA-1: 78c29851efa92e326f6536999ecaadafb43deef2 SHA-256: fc4533386040128bd189d0e87cc84ede22fc68b13f730a4c14222157b4921438
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'jacksth.ru', which is likely a malicious domain used to host phishing content or download further payloads. The document body, though heavily obfuscated, contains text related to 'Don Quijote' and the authoring application, suggesting a lure to disguise the malicious intent.

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://jacksth.ru/wix?keyword=don+quijote+analisis PDF link annotation
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/gubol_buvixotaroza.pdfIn PDF document text
    • http://fruitnaturs.space/world_conqueror_1945yfsps.pdfIn PDF document text
    • https://cdn.sqhk.co/lojegalivo/aJgfRha/christmas_bingo_prizes_ideas.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/1097839.pdfIn PDF document text
    • http://graatorama.space/jowimokugogosafosero3hitb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_60186c0c715a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_6028bfec694ae.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/usos_y_aplicaciones_del_benceno5s6qo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fe03dcd81b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe98e1f358d6.pdfIn PDF document text
    • http://hellesypakk.online/530286844506brhp.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/7747318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5fcbf2fb01a62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mejifavo/right_triangle_word_problems_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/direct_debit_mandate_template_barclays.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/76802081414.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/inscribed_angle_in_circle_worksheet.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_off0001628a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1628A 4668 bytes
SHA-256: 7ec0609c4489bcdda4c30261d84eb7eb4da40a6b80c7e59df925995c083475ca
font_01_sfnt_off0001727d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1727D 10408 bytes
SHA-256: af81edd1f6aee5ddf566a64758b3b086fe91fc8d6529f488225f3ab79543b7d2
font_02_sfnt_off000195f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195F8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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