Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1bdef95b904aa9…

MALICIOUS

PDF

73.7 KB Created: 2021-03-08 16:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b7a5c5759cdf16fe5651a38d3d1fa96 SHA-1: 42c5e5356debbb3090ecb0afaa6e5e3860ccb9df SHA-256: fa1bdef95b904aa9398d1516fd718b3e50a66a753025e492074aeecfb50f78ab
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/award?keyword=s%25C3%25A1ch+american+english+file+1+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5fcb7404a87cd.pdfIn PDF document text
    • http://lexidubug.22web.org/86883408900.pdfIn PDF document text
    • http://govorudoxamelap.22web.org/89752681325.pdfIn PDF document text
    • https://wezawelo.weebly.com/uploads/1/3/0/8/130813956/c1c6a6a0.pdfIn PDF document text
    • http://jibesikore.iblogger.org/lagu_lily_cover_eltasya_natasha.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/ghwOCig/82429717429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455916/normal_60046e8e2bbcf.pdfIn PDF document text
    • https://wukisusu.weebly.com/uploads/1/3/2/6/132696029/423756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470523/normal_602bf87291947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_5fe9a8cea1d8d.pdfIn PDF document text
    • https://lopetumidola.weebly.com/uploads/1/3/3/9/133989387/wazeguzulugiduwipa.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/jftRMgi/49681065676.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/9003383.pdfIn PDF document text
    • https://cdn.sqhk.co/mapigusene/ggKicTB/85164004010.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/jolituzoji/piscicultura_agricultura_familiar.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/cartoon_network_anything_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/bewozivarekusiroxokawujik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6f0e52-069e-438a-b8ed-50c4bae9ee56/27850133350.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/format_of_a_report_writing_with_sample.pdfIn PDF document text
    • http://gerifanonejuvad.rf.gd/wuribusoto.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/kerboodle_summary_questions_answers_biology_ocr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfe8388-cbdf-4173-a162-f34746040784/6455735219.pdfIn PDF document text
    • http://kokomato.epizy.com/82278231710.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_off0000dc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6E 5956 bytes
SHA-256: b00b9b74ff7b5f9d3615681e429b1074276d201a933d7a7af11766d7a6cdb203
font_01_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 13392 bytes
SHA-256: 82db46bb3ba5b276a97b35e19b0e8a0c58d2cfb6ce4df46d81f4f3f829afa5fe

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