Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fa5c1dbb530344…

MALICIOUS

PDF

79.2 KB Created: 2021-04-02 00:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b21c5c8f24f0a158cf41014e882b2d8d SHA-1: 86394b093e088f5a435bd36b4df1c4276d0fffc5 SHA-256: 16fa5c1dbb5303444be5b69960305c686d94bb2c4906a234d9342da7c3e3c2df
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://nipisod.ru/123?utm_term=equation+solver+calculator+free PDF link annotation
    • http://tagaporigowekis.mygamesonline.org/42657038579.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/sulabufoxuru.pdfIn PDF document text
    • http://ufenmac.com/how_much_is_hp_probook_in_nigeriaj4pjl.pdfIn PDF document text
    • http://gouliwer.online/vufapizerivokifdmtwr.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/72460794053mqgv.pdfIn PDF document text
    • http://netzamka.ru/pujakqiy62.pdfIn PDF document text
    • http://rukakev.iblogger.org/approximation_math_questions.pdfIn PDF document text
    • http://nomozufigupet.iblogger.org/kowunapejapabemoxiduzex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonogobujajeva.rf.gd/english_phonetic_sounds.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/aws_s3_bucket_cloudformation_encryption.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/xekigipedinebur.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/jakexatagidusanurito.pdfIn PDF document text
    • http://kojodidekojamu.rf.gd/dobab.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/police_constable_exam_questions_and_answers.pdfIn PDF document text
    • http://zaramapowo.rf.gd/mojipefejadepuzopinoxose.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/por_el_placer_de_vivir_radio_monterrey.pdfIn PDF document text
    • http://xanalun.rf.gd/72012930018.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/46436043117.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 5020 bytes
SHA-256: 1ea1eda8b3c8d71da5b9f8e55d6102181e154a8ef627c035ffb817b06de5ab4b
font_01_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 12004 bytes
SHA-256: bcae67dcf28c38e1e6061412c50b05eaef12f026958806e6206978bddcb3a6f1
font_02_sfnt_off00011ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 16080 bytes
SHA-256: a534b91c4ec3d8756e3a834051570443c69e75f38d6508a28567570861ffac3d

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