Malicious PDF — malware analysis report

Static analysis result for SHA-256 0967f9e5b35a35fe…

MALICIOUS

PDF

79.7 KB Created: 2021-03-01 21:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ae7141040532a84f1be234afa7b8b185 SHA-1: 946213a15c74a263cf839a92e9490a25b9b732ba SHA-256: 0967f9e5b35a35fefa4ba4cec09a840e4c4efab4cfefe3363fb0ce6178b9eceb
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 0.9998

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 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://midufefew.ru/123?utm_term=amazon+echo+owners+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486522/normal_602b2766692cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_5ffa207e8741a.pdfIn PDF document text
    • http://kawlites.online/electrical_and_electronics_questions_and_answers77jjc.pdfIn PDF document text
    • http://mandarins.space/tekuzijeka252z6.pdfIn PDF document text
    • https://barosowuni.weebly.com/uploads/1/3/1/3/131398377/panobu-galodikujudub-xifami.pdfIn PDF document text
    • http://apelsins.space/wamavutozufv7ja.pdfIn PDF document text
    • https://jirewolekaza.weebly.com/uploads/1/3/4/3/134387643/3723408.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/94149097364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_6036154bdae24.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/qumi_projector_q5.pdfIn PDF document text
    • http://banolapisa.iblogger.org/69249640216.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/vhjgfhb/sunez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_600ea83b7f5ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_6000c470b4203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larilelux.epizy.com/ashok_chotala_new_song.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/solving_quadratic_equations_ppt.pdfIn PDF document text
    • http://nimunofat.epizy.com/title_background_videos_hd_free.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_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 5528 bytes
SHA-256: 0f308f64da59d763e7e8fe2bb87b7ef610a24c3faa50cd7ddfc1e31a969cc551
font_01_sfnt_off00010c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 10988 bytes
SHA-256: 3af4b65dcfb102b886106b86ce76656769f1ceffd1b15670b8c1891b6456a536