Malicious PDF — malware analysis report

Static analysis result for SHA-256 050f33df8bb94f58…

MALICIOUS

PDF

74.5 KB Created: 2021-04-04 11:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ed8d307504fca769f3b0649c1aa416a8 SHA-1: 9085015775a44ff6559dc88c658f6c8bc1859316 SHA-256: 050f33df8bb94f5879cae505c455317f1ba12ceeb935de23b30ebac9db18f80f
156 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 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 0.9997

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://jacksth.ru/wix?keyword=minecraft+pe+1.0.0+apk+free+download+android PDF link annotation
    • http://businesslinecenter.com/90421180924ng79z.pdfIn PDF document text
    • http://help-copyrightservice.xyz/32392490420f7d2c.pdfIn PDF document text
    • https://pukunave.weebly.com/uploads/1/3/5/9/135957849/14e39.pdfIn PDF document text
    • http://batmbatm.ru/beauty_and_the_beast_eng_subu3p8w.pdfIn PDF document text
    • http://dom-bita.org/guzoxokabilo3zthz.pdfIn PDF document text
    • https://lasezafokovopar.weebly.com/uploads/1/3/5/2/135294620/7053451.pdfIn PDF document text
    • https://sifimimufiwiz.weebly.com/uploads/1/3/4/0/134000394/bagemanizu.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/warriors_dont_cry_test.pdfIn PDF document text
    • http://leree6.club/this_is_water_david_foster_wallace_annotationsvyuef.pdfIn PDF document text
    • https://lonexababite.weebly.com/uploads/1/3/1/1/131163854/521606.pdfIn PDF document text
    • http://mailedflkf.site/gezukuveruxunaromi905dg.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/sixolose/wodulizuzonivadukufufewoj.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/85452983433.pdfIn PDF document text
    • http://bobixupeto.myartsonline.com/33119891847.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/azur_lane_sakura_empire_fleet_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/totewavumopuwesavogu.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/explain_why_it_is_not_correct_to_use_a_pie_chart_to_display_these_data.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/43891792290.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/16069069742.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/91989143233.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_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 5360 bytes
SHA-256: d9bfa86a17efc43c705eddd99ab9b4e2b4a3e7ec1a18159d469f9952cc27d9dd
font_01_sfnt_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 12544 bytes
SHA-256: b4bf6a350f840ec574ccd8f9efddf6068c5f08374fdd18a5c64d63da283a1933

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