Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cdffc3ccc39c6c…

MALICIOUS

PDF

72.4 KB Created: 2020-11-28 22:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f6d5513b5648971bfcaae2f8d0a2ccf0 SHA-1: 227025c2e4434996d6784248864f113b0edbc79d SHA-256: 56cdffc3ccc39c6c17ad233b47b9f2eb57004269f4627299c7be1f30278ae46e
96 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. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document body, though heavily obfuscated, contains text related to 'mastercard guide to benefits', suggesting a phishing lure.

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://trafficel.ru/aws?utm_term=ll+bean+mastercard+guide+to+benefits PDF link annotation
    • 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://uploads.strikinglycdn.com/files/09566063-3db6-4ee6-9012-1aee11bc315f/kojipupapirezuzirudifij.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/kizumukaluwepizuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/benefits_of_technology_in_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/84867471948.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/84091268026.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/mekatogagogaku.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/greensleeves_flute_duet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/63045889191.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jinopilanamekiwixivif.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/niwapobogefifeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547451d2-29b6-4d8c-9afe-88d08b12a262/weather_vocabulary_1_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/american_paint_horse_association_registration.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/50917223760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57540a7f-7d7e-4bf4-b952-a2fa8ec95d28/fuzan.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/consumer_report_on_amana_refrigerators.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_off0000cf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF27 5304 bytes
SHA-256: b8779ef09c834ca33515d72e1dd62503fd2c91a56a6e228b85e81fd00090ffc3
font_01_sfnt_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 10864 bytes
SHA-256: 9a2d94e7d60fd614b8e98e235d7a98c51286ea257d04d8b494f47c610f52362e
font_02_sfnt_off00010600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10600 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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