Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade16d0a1e28e399…

MALICIOUS

PDF

92.9 KB Created: 2021-03-23 15:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cca16aa247cb81fff7bdb5e819f4aa0e SHA-1: 943a633d9dcaf910f610cf51e6862818988f29f0 SHA-256: ade16d0a1e28e39961f216e560dd9187d902e033697b758085ce269248e7f2f6
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to a suspicious domain, combined with a visual download button lure, strongly suggests a phishing attempt. Although no scripts were explicitly extracted, the PDF_URI heuristic indicates the document likely contains embedded links intended to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dewalt+dwx726+rolling+miter+saw+stand+home+depot PDF link annotation
    • http://kusafomidufe.mywebcommunity.org/neil_degrasse_tyson_accessory_to_war.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/85039173895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_6023888391b2c.pdfIn PDF document text
    • http://bapefajavijofo.66ghz.com/honda_cbr1000rr_2010_service_manual.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/kuxuwogixex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_5fdaae97aee34.pdfIn PDF document text
    • http://xaraxag.mypressonline.com/estadistica_descriptiva_que_es.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/h2o_mop_x5_elite_how_to_use.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/who_is_father_of_modern_philosophy.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/wekibik/99559795700.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/destiny_2_attunement_of_grace_guide.pdfIn PDF document text
    • http://gijuvaginitawaz.epizy.com/88209852777.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/broiler_chicken_vaccination_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/mevutawunobeb.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/5269857722.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/algebra_2_b_edgenuity_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/15488824965.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 5900 bytes
SHA-256: a13af4fb40ebb326532ff4aa5e29fc88c14a8bfe15c80a7355f420ffada40a4f
font_01_sfnt_off000125f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F0 12316 bytes
SHA-256: eae2b986a2fd02d3623fc8431ee3af5267cb3c359eeb727ca4baee102d51fba7
font_02_sfnt_off00014fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC0 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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