Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14b11c8dae1fe22…

MALICIOUS

PDF

69.2 KB Created: 2021-02-08 18:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00778d0a56799127fbd6518ea2c281d3 SHA-1: 6cafc308e7bfdf7da61961ec76a997d1d324fb25 SHA-256: a14b11c8dae1fe22f6ccd2b1003f8cbc1d902083027153df67918af544e8d9be
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the presence of external URIs suggests a downloader or phishing lure.

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://maypoin.ru/wb?keyword=alphabet%20design%20free PDF link annotation
    • http://gitipakivo.iblogger.org/84757382120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_601fd603c7640.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/dZgcBgi/the_last_house_on_the_left_2009_netflix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467032/normal_5fcad522a5c1c.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/jbf3uic/xijokigedazowufaxozimulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fc5f7d5385c1.pdfIn PDF document text
    • https://cdn.sqhk.co/fokolamezo/bVYhgih/kpop_idol_producer_mod_apk_1._31.pdfIn PDF document text
    • https://cdn.sqhk.co/matapolid/NhbyVgh/kisedelam.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/netinuwa/pivot_table_using_multiple_sheets_excel_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/pidog.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/47293718087.pdfIn PDF document text
    • http://zuniguvip.epizy.com/rimixusejaxizekofo.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/the_chrysalids_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/ppt_puzzle_pieces_template.pdfIn PDF document text
    • http://zunimesigo.rf.gd/ethical_business_practices.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_off0000d1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 5432 bytes
SHA-256: 73581a375d72773e2edf3f9763fe637247d1c57f5d445ce828f78b521287013a
font_01_sfnt_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 10536 bytes
SHA-256: 3538bd1d479178de35d04fc141f49ddb66205e7cd5541301f8496b081c629591

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