Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25e41d4a2bc00db…

MALICIOUS

PDF

71.4 KB Created: 2021-04-20 14:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87e1fd94445d62b69f958a881f9d3e0e SHA-1: 748b02e2a80bc61055bec865d7e83366fa33e6a3 SHA-256: f25e41d4a2bc00db46044c9fc11bf9f0545d19288dfb679e5a9aaaf70f65d73d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://leonvi.ru/strik?utm_term=derek+prince+books+free+pdf PDF link annotation
    • http://lg-copyright.com/tipos_de_conectores_en_espaol_y_ejemploscjswy.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/e4hihfp/best_epic_brawler_in_brawl_stars_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_5fd120b5403e8.pdfIn PDF document text
    • http://55571.ru/xedovaka7tf1g.pdfIn PDF document text
    • http://a1metromovers.com/41765870036ehpwo.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/wrhcjhf/levofesojivifi.pdfIn PDF document text
    • https://bojomuse.weebly.com/uploads/1/3/4/4/134462584/67a4406.pdfIn PDF document text
    • https://gumarifubora.weebly.com/uploads/1/3/4/4/134465571/dopuminalewa.pdfIn PDF document text
    • https://mozijazese.weebly.com/uploads/1/3/4/4/134460989/wifivaluburuma.pdfIn PDF document text
    • http://reduslim-shopufficiale.site/620853909761avyn.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/Bgdghn3/lurebabafutojosono.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/3609211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5fe7196c555df.pdfIn PDF document text
    • https://regisaralox.weebly.com/uploads/1/3/2/6/132681556/ponelapipu_susenagef_nobevezasoz_vawoxitowamif.pdfIn PDF document text
    • https://petekebinipaz.weebly.com/uploads/1/3/5/3/135395272/mofilugofadokup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_6056482c39eea.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/xesokolawo_zibet_wubiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 5112 bytes
SHA-256: 9703291b84429b7351be354fbe54ad83ccada104639fea033f3b5e2c369636f7
font_01_sfnt_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 10896 bytes
SHA-256: 915ead11754aba6cc126e19b99376bdf692de5d308586ef0a68c2471d433b73a

Open this report in the interactive analyzer, or submit your own file for analysis.