Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0eff51fc6fbbe1…

MALICIOUS

PDF

89.9 KB Created: 2021-03-24 08:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 90032d2ea86dffc0784a19b671fa5753 SHA-1: 17799ac2fe88c71aac6d420b33e048af76cac1ee SHA-256: 9f0eff51fc6fbbe1b5c8b231fb202347a1837c54e4588166dc5bcab5eaa866c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=the+earth+chronicles+zecharia+sitchin PDF link annotation
    • https://cdn.sqhk.co/nulusezitelo/jghgjYK/91067653367.pdfIn PDF document text
    • http://turiwovezaz.iblogger.org/94875652261.pdfIn PDF document text
    • http://matcobzor.ru/68954285733gdi82.pdfIn PDF document text
    • http://batmbatm.ru/what_does_structural_frame_mean_in_artwrwjq.pdfIn PDF document text
    • http://ketorebagibof.22web.org/roluselikoj.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/xiluridabos.pdfIn PDF document text
    • http://byt-upak.ru/44802609691lfpoh.pdfIn PDF document text
    • http://kpupnov.pro/dante_paradiso_canto_6_summaryzkk77.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/iia2fjh/37786946731.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_3c0011dc5d9c40eb88c0af4d83b4f027.pdf?index=trueIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_4ef1a5e9bbb541d5b8bc434458e270f9.pdf?index=trueIn PDF document text
    • http://bedawisanono.epizy.com/18354120878.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/28869207105.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/pabamibefez.pdfIn PDF document text
    • http://godidab.epizy.com/35254246894.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/lewaxowoger.pdfIn PDF document text
    • http://silapopo.epizy.com/tiwenijudojupogo.pdfIn PDF document text
    • http://girenasefivu.epizy.com/how_to_fix_keurig_leaking_from_bottom.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/16948969469.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/65548647509.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_370de087ce5b45e3863daf411a00f2b4.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_f2335b9bafb8485884a4895170ada05f.pdf?index=trueIn 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_off000122ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EC 4884 bytes
SHA-256: 7c5e070c197046ef1f2695ca60001831cdb1ce7586148a3a70213c275cab2b9f
font_01_sfnt_off0001337f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 12256 bytes
SHA-256: 01f76bbafecd3e4974f42dbedf22e9eb43926a4435bf0ad5e17efdca339e9ad4

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