Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5167473c8d9f7b…

MALICIOUS

PDF

87.1 KB Created: 2021-04-27 06:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36a202c92cb9e6e9d598b4c96c94666 SHA-1: 292cfbe6de3e38b92fde4e224daef86c6ac589fd SHA-256: fd5167473c8d9f7b82b2a51767b766df6dc04ec02bf325b2be175e5ee153f0df
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs within a PDF is a common technique for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/strik?utm_term=britax+boulevard+70+g3+installation+rear+facing
    • http://serururepus.scienceontheweb.net/advantages_and_disadvantages_of_mobile_phones_in_telugu.pdf
    • https://cdn.sqhk.co/pevelefotuve/5hbWjaM/8578059608.pdf
    • http://jiteruruw.sportsontheweb.net/programa_de_estudios_2011_secundaria_matematicas_primer_grado.pdf
    • https://cdn-cms.f-static.net/uploads/4369174/normal_602cfe94048ea.pdf
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5fe6f5eebef40.pdf
    • https://cdn.sqhk.co/dutigimomana/rghifgi/62167553654.pdf
    • https://cdn-cms.f-static.net/uploads/4375890/normal_603975b665c66.pdf
    • https://cdn.sqhk.co/kagumuzom/jfihHDD/ritiv.pdf
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fe59f20a67d0.pdf
    • http://mofonuf.medianewsonline.com/louisville_slugger_upm_50_black_flame_pitching_machine_replacement_parts.pdf
    • https://cdn.sqhk.co/vekuperik/Vjiwifs/82434512844.pdf
    • https://cdn.sqhk.co/genopeno/WjhjjEQ/vejogadunarexafu.pdf
    • https://static.s123-cdn-static.com/uploads/4368953/normal_5ff466c39d25b.pdf
    • https://cdn.sqhk.co/jeporikate/iih4Qum/2276401061.pdf
    • https://cdn.sqhk.co/miburixegapu/DigbAih/sekiwanawojepututizo.pdf
    • https://static.s123-cdn-static.com/uploads/4482854/normal_5fec6bb0d2853.pdf
    • https://cdn.sqhk.co/lizasizova/hahbjg3/45370015777.pdf
    • https://cdn-cms.f-static.net/uploads/4367645/normal_605702b99f286.pdf
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fd78bbbbd8f6.pdf
    • https://cdn.sqhk.co/gujowaxexag/NggjjaW/bibibuvufa.pdf
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fe620e4d21b6.pdf
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fe61d8919264.pdf
    • https://cdn.sqhk.co/visobipibe/AhaYjfh/running_fred_1._9_2_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://medazupu.onlinewebshop.net/interview_questions_and_answers_for_technical_support.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff6c.bin
4c567e777080d11723f28e22cff9d113bef1cd18ede729ba21fc9627ec07d35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 5892 bytes
font_01_sfnt_off0001138c.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1138C 6148 bytes
font_02_sfnt_off0001236c.bin
cba304a3cc784be71e6cd2a09457c4dd1a4c44bfec822e4bd29d7e9056310e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1236C 12292 bytes

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