Malicious PDF — malware analysis report

Static analysis result for SHA-256 e825c02a577e6741…

MALICIOUS

PDF

77.4 KB Created: 2021-03-13 15:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecaf654490fa4036d8d6239206eb0152 SHA-1: 11382faeea6f89bfe3d5307cabf6372014f8f697 SHA-256: e825c02a577e6741ae826a1408c7d30c3dcc9391186bf97b5b37e49e6ecc5c5b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=premiere+pro+free+download+windows+8 PDF link annotation
    • http://yourlivehelp.com/xamaxusowogoribovefu6f48h.pdfIn PDF document text
    • http://subaxidubuju.22web.org/jensen_vx7020n_manual.pdfIn PDF document text
    • http://vewikimeno.22web.org/24537187229.pdfIn PDF document text
    • https://puzagoliwosur.weebly.com/uploads/1/3/4/4/134462366/1644344.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/9932bd5.pdfIn PDF document text
    • https://biditojutorosas.weebly.com/uploads/1/3/4/6/134657596/rarojiki.pdfIn PDF document text
    • http://gmetry.online/chlorure_de_fer_3i46ns.pdfIn PDF document text
    • http://bullbananavannaone.xyz/206390252817ovvj.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/raxulegulawamarapu.pdfIn PDF document text
    • http://nicechange.space/photo_music_video_maker_app_downloadybdpr.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/vizegemawokaxe/zadixuzalonavitabuxotipeb.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/weriduzolupixiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/answer_machine_number.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/music_of_the_night_easy_piano.pdfIn PDF document text
    • http://nifukugobu.rf.gd/45796938468.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/char_broil_performance_5_burner_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c652700-1f2e-44be-b3c1-bf070e97b8c7/st_augustine_timeline.pdfIn PDF document text
    • http://virefixifefuke.epizy.com/jovatotirisij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16d7874-fdf2-4e33-b06b-80f0f42b279a/how_much_horsepower_does_a_jeep_4.0_high_output_have.pdfIn PDF document text
    • http://fozovevozasox.epizy.com/nepebelirojawivew.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/93012085951.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_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 5476 bytes
SHA-256: 2361b75e01ecea211c63f8c51c4442130a26eae75438d44c30e52d3afbb1004a
font_01_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 10156 bytes
SHA-256: 8d058aa5f58d64c9ca146bfdd458d94272cb227c366dc0c10f3832912690c9ba

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