Malicious PDF — malware analysis report

Static analysis result for SHA-256 776f3a8544cb375d…

MALICIOUS

PDF

62.7 KB Created: 2021-01-25 16:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 35b64d1c258502e10e2282170f915efe SHA-1: 3270cca657085aaa3f8fafbac01e694a34aef0a2 SHA-256: 776f3a8544cb375d13f71d48b9f2fac1008e0db18ea74806b94155040abf2605
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://leonvi.ru/aws?utm_term=bipap+avaps+c+series+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5fca9fd8ad0a3.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/ghUhche/save_mother_earth_song_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5fe6fb4588f0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493550/normal_5ff278ca85c5e.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/gdiahdG/sonic_mod_minecraft_pc.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/lovomijelun/26445225194.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/63230103807.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/92719698980.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/51160829025.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/performance_air_intake_systems_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/a_p_aging_report_sap.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/rewivisulunanike.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/2465828402.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_off0000bbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBB 5188 bytes
SHA-256: b0b1fa57d282c2b83f46d13789a9cd1e6bc4c15a6df177a366f1073cb55b814f
font_01_sfnt_off0000cd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 9484 bytes
SHA-256: 1022cb5ccf1dbbbbf7355dd65ee5229bcb8a5ca4965899044ceb59ee7f41f5c6