Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cccbd520d156aa9…

MALICIOUS

PDF

64.7 KB Created: 2021-02-04 21:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fffd0e6c00675a72086972746ea6e9d2 SHA-1: 14c3754c357efee78506fd737101cc045adc77e0 SHA-256: 7cccbd520d156aa96a121f472a99667d0f629443365fee22856946352063d551
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as educational content, which is a common phishing tactic. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this link points to known malicious infrastructure. ClamAV also detected the file as 'Pdf.Phishing.Trojan', further supporting the malicious classification. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=math%20grade%206%20workbook%20answers In PDF document text
    • https://cdn.sqhk.co/xazururoxe/hfahehj/93114202331.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/fLjerHd/lake_las_vegas_water_park_discounts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_5ff4e87f51c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5fdbeca1391e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_5fd64b961cc66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5ffe9ed01f6a9.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/Vibcajb/old_man_s_journey_apk_mod.pdfIn PDF document text
    • http://povar2020.site/diccionario_practico_de_gramatica_pdhhpi3.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/dljbQTC/71575363959.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ijMidwu/teddy_roosevelt_terrier.pdfIn PDF document text
    • http://triple-doska3.club/two_dots_controller_pc_driverkxku5.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/gi6pigu/avg_mobile_antivirus_security_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384464/normal_5ff443bcaec8f.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/jajiAji/39693613954.pdfIn PDF document text
    • http://lady-bug.club/perisno_third_legionr3lsw.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/piradi/83774602781.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/53945558851.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/belpre_oh_police_reports.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_off0000bf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF22 5512 bytes
SHA-256: 7f97293af016af5db7b6d623a84fc1b59be91f7bc400a49d61b3b842095ddb5b
font_01_sfnt_off0000d1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F1 10640 bytes
SHA-256: c0476e0283c7808e867324d97c935dfe51da92b9f07866db11e00d2f54527a80

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