Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c0e4a98e5461e9…

MALICIOUS

PDF

74.1 KB Created: 2021-02-05 18:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1515163c7b37f8b9e4a79e8583c6c74b SHA-1: 2c3f8c52fcde824d0b310d83b23a52b1ff41b8d4 SHA-256: 53c0e4a98e5461e9092644d68092d010e363212872b802998fc4bc97776c1b38
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious payload or phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to exploit users through social engineering, likely as a phishing or malware distribution vector.

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://jacksth.ru/wb?keyword=7%20years%20old%20lukas%20graham%20sheet%20music PDF link annotation
    • http://mixed-rootwork.com/ligakosezopi49y4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_60119a70b078e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5fcaa44a5d5d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449000/normal_600440c1e11a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419849/normal_5ff91c3dae2a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_601070a18643d.pdfIn PDF document text
    • http://doorstepcomputers.com/400322856133sya3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_5ffd7b01b1d40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ffcc2b06176b.pdfIn PDF document text
    • http://migajipanijezep.22web.org/metabolismo_de_proteinas_y_aminoacidos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479917/normal_6003953345c80.pdfIn PDF document text
    • http://casbah2point0.com/1010_block_puzzle_game2bpwo.pdfIn PDF document text
    • http://metazoaapc.fun/siduxejebujatigexye61n.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
    • http://fazafowunop.epizy.com/55881874785.pdfIn PDF document text
    • http://logasexa.epizy.com/amino_acid_abbreviations.pdfIn PDF document text
    • http://gikosetopetidun.rf.gd/appeal_for_funds_letter_sample.pdfIn PDF document text
    • http://jelalesixavab.epizy.com/benaam_badsha_full_movie_720p.pdfIn PDF document text
    • http://rakejobik.epizy.com/cordless_phone_answering_machine_headset_jack.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_off0000d434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD434 5280 bytes
SHA-256: 661f865688dd81c338448f5ccc5c8393e4128a84179228393141ee7ca1aaf03f
font_01_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 11948 bytes
SHA-256: bdcb4e6fb996f2078cee51dba273fc75b758b1ad28cc6af7e8f84f35006ca3c5
font_02_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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