Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d70b604eb8524ff…

MALICIOUS

PDF

64.8 KB Created: 2021-02-16 00:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc3d36de4fadeb9ec9d2b978cd7c92b6 SHA-1: d9b9346118f1272dfec6b53c64f3461817089f4e SHA-256: 7d70b604eb8524ffdaa4d90a7a52a44db68dd196244a4f79bc68e92b87301bfc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure for the embedded URL.

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
  • 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/strik?utm_term=flir+c2+manual PDF link annotation
    • http://hookup157.fun/escrever_frmulas_matemticas_online4j1oc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480590/normal_5ff38c8dba667.pdfIn PDF document text
    • http://koteyarn.moscow/901165472020ure8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443804/normal_5fdc98126a484.pdfIn PDF document text
    • http://ctyr.ru/50801117659ze4rw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_6001e2cc19cff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5fce9af27f631.pdfIn PDF document text
    • http://healthytrands.com/417552721000cbwx.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/gcP2ryN/wedding_cake_decorated_sugar_cookies.pdfIn PDF document text
    • http://rarebuzoxexovom.22web.org/xilubanovaketuvivasejirig.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/jebinukagov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://webubekesivamuf.epizy.com/conditionals_quiz_with_answers.pdfIn PDF document text
    • http://nozafawuronixe.epizy.com/free_english_tagalog_dictionary_install.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/free_gdpr_consent_form_template.pdfIn PDF document text
    • http://lufeneweb.epizy.com/webumerozosi.pdfIn PDF document text
    • http://putesedesupelo.epizy.com/xutexoze.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_off0000c194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC194 4856 bytes
SHA-256: fba72570149e963deb4604efd111ecd58d413bd30bc188b48be739f1384c9539
font_01_sfnt_off0000d1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FE 10780 bytes
SHA-256: 4370a58e784ca0ed3a845c320d43aa872c191ee4bb8c48c8018a109266325ad2

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