Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b63f425fc973c0c…

MALICIOUS

PDF

71.3 KB Created: 2021-03-02 12:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3d4d872b7405009c356d1631d4cea00d SHA-1: 38f70374d902f8a4d7f255b483491a221bcdd567 SHA-256: 7b63f425fc973c0c3c79dafd9facc3f2babcb5ef1995d56c2c2d87dd9c57e004
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=american+laser+centers+utah In PDF document text
    • http://all-system7.club/fisojubekofoseip7h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5feb0e32186f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5fc8f8d442186.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/cdfc5ea88.pdfIn PDF document text
    • http://instapriz.website/522992653027zb4m.pdfIn PDF document text
    • http://terem.space/50011134292ukr8j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_60225d4ee761b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fd04a1483fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_6011e71d8756f.pdfIn PDF document text
    • http://wejnpowk.space/gadgil_report_summary_in_malayalamsif91.pdfIn PDF document text
    • http://roflan.site/dnd_5e_wizard_healing_spellsw1fka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_5fdc7674981d6.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/h9GIieO/zagef.pdfIn PDF document text
    • https://divekoworubu.weebly.com/uploads/1/3/4/0/134017674/jizufub.pdfIn PDF document text
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/wedojolopaxenovarex.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/5f5b0559.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/kujapomib/chiquitita_abba_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/fakilun.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/blogger_template_design_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/bepumopexopejupowimolefa.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_off0000db8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8C 5028 bytes
SHA-256: b2f987fd975a8ce040abd1331a6593dc55d6066a455c447606ae2c4d2ffdb5ea
font_01_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 10488 bytes
SHA-256: 45418602790140dfeba98c5e50485c635a68a25a1889b6474cfe5dc51b9cdc82