Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff4fc9da3cc806d…

MALICIOUS

PDF

90.9 KB Created: 2021-02-25 20:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c8e1b9f93d1f08500b3efd79a8cd227a SHA-1: 232ad17b763051b55ff5f5a1dd0d9241d7bac57f SHA-256: eff4fc9da3cc806daf6a7b72336d506845df883ac09473f096bb7f2d8f65add0
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 0.9992

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=what+is+different+about+two+isotopes+of+boron PDF link annotation
    • http://samettemiz.xyz/snacks_recipes_freeior4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_600e8f48db347.pdfIn PDF document text
    • http://chelamela.org/letterhead_word_2010_templateqcbdz.pdfIn PDF document text
    • http://piredvizhnik.com/fekinesirotovov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fffb33be22ce.pdfIn PDF document text
    • http://podarokinsta24.online/33224368645qoh7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5ff1c5bca601d.pdfIn PDF document text
    • http://prosale.company/rappel_master_course_texas1h5pi.pdfIn PDF document text
    • http://andyhongdigital.com/zisurikaguphxvts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_60296eaa2f67c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481072/normal_603175411f54d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476954/normal_6016145543281.pdfIn PDF document text
    • http://komarovskii.xyz/cerro_gordo_county_jail_reportafvnz.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/lg_wireless_earbuds_with_mic_reviewshulku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388169/normal_5fe392a03ad4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468267/normal_5fcf8ca4dfe6b.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/c_oops_advanced_interview_questions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/15808750684.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/propresenter_5_windows_10.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/price_volume_mix_analysis_excel_template.pdfIn PDF document text
    • http://mafukifuwu.epizy.com/kivodaketililip.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 5340 bytes
SHA-256: 51922d3e6a4af7f4a84a1a9d6ede49d7a2776b4888efc313a43ef7dc590d96cd
font_01_sfnt_off000117fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FB 1796 bytes
SHA-256: d9f96797a54aa890ffc864a62d0ee1bea369dc139b9f5922dbee51669d5f236a
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 11208 bytes
SHA-256: fa10918d9b59c17dba133b58f0caddab69adfa0d8b1dc196b5ff78d1e9b6705f
font_03_sfnt_off000146f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F5 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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