Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda9f2e421fd4c86…

MALICIOUS

PDF

75.1 KB Created: 2021-03-05 01:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b651e88396b5557e444eb173d8d453cf SHA-1: bb3c709af1f346a73abca2d1875e048d5afe2a18 SHA-256: eda9f2e421fd4c8684bb5fc294071d4a9331daccb87f97faafc4ce54e218f1ce
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading content. ClamAV detection and ML classification strongly indicate maliciousness, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to trick users into accessing external malicious resources.

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://maypoin.ru/wix?keyword=rise+of+the+runelords+burnt+offerings+pdf+free PDF link annotation
    • http://kupelobivinix.22web.org/80216474078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371269/normal_6005978f4785a.pdfIn PDF document text
    • http://kenujuzuba.22web.org/la_maquina_cultural_beatriz_sarlo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478408/normal_5fefb9905d926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5ff7150744b13.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/solving_word_problems_with_money_2nd_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fde087e5141f.pdfIn PDF document text
    • http://mamikuv.iblogger.org/molebogakogopunatolelew.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/sesafefanulokam/33257521943.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/garmin_astro_220_compatible_collars.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/tanefebekukipazaj.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/hl7_cda_certification_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/43611647709.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/womed.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/nsw_ombudsman_reportable_incidents.pdfIn PDF document text
    • http://farujage.epizy.com/chin_hin_group_property_berhad_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/89200985410.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/53974138550.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/windchill_directory_server_administration_guide.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_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 5240 bytes
SHA-256: 8a3c874039da9b88277b7cf75b88475b1f5ccde1d149e039132f50760726c543
font_01_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 10328 bytes
SHA-256: 238f37586f236216c3886e1b90f47bbb5472caed3cbbf22cf8e520a9537574c1

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