Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce3b76df2637bc…

MALICIOUS

PDF

90.8 KB Created: 2021-01-08 19:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 30671427244071f1bdaa3251049e0da3 SHA-1: 1b4ba65442849000011296279c6e4c51aa63c73c SHA-256: 49ce3b76df2637bc70b05d7318215d03f596f4647a636cbb16c3cacace87aede
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to sheet music, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://trafficel.ru/aws?utm_term=defying+gravity+sheet+music+violin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471948/normal_5fba50568a43f.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/dzjiuif/zemuzawukujazuzo.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://uploads.strikinglycdn.com/files/d6e285c7-e765-41be-8eda-0a6536f0a65e/dowosiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d16b65-b03b-4007-aaa3-a2e11250dfe6/mumoxokamuludukijoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6045899c-4473-4c15-b0c8-01f69013cc02/88694275425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768d7c80-f136-4505-befb-35ac137fef27/kunibexemegewix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a83a39-63a0-4fc6-a45a-fff6ddb88fda/gopofamex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931315eb-007a-4d1e-9b6b-4fe0fecc7ba9/dress_up_girl_games_fashion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e2b092-af8c-48c7-8367-ef77486d38d7/jofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6d1d6d-bce9-4375-bd98-57bd68d81d8e/anonymous_face_mask_2_year_old.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000125d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x125D4 24452 bytes
SHA-256: 5362f7b84158b051d47f43a22f4b6be418e3dc480253f622a84b58380317c5e9
font_00_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 5340 bytes
SHA-256: 027dbbb0cd6780fa6bf791404710ca76979e185379d97f94d787bf4844078fe9
font_01_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 11628 bytes
SHA-256: 37d3346be65afd64f5b4c4a151463f092b77f76ae1d88d735f7f4e1187840d9f
font_03_sfnt_off00014ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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