Malicious PDF — malware analysis report

Static analysis result for SHA-256 182b140574a3471e…

MALICIOUS

PDF

74.6 KB Created: 2021-02-16 11:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 607f0dd9e277d6b0bc6e507b7d458c93 SHA-1: 64f80598929985c057c0b4a34686a39c4d663b87 SHA-256: 182b140574a3471e2e9aa96ffdddc694947aa21dcfc0973b0c61484a31e71b61
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=monster+quad+review PDF link annotation
    • http://sarkife.site/hewan_vertebrata_dan_invertebratahzl6c.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/parot_retowotapudepa.pdfIn PDF document text
    • http://akmurzina.com/chick_fil_a_team_memberh2a2b.pdfIn PDF document text
    • http://prodit.space/baa_nalle_madhuchandrake_kannada_movie_songsyvgo0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_60170279849dc.pdfIn PDF document text
    • https://lafevisok.weebly.com/uploads/1/3/2/6/132683062/2b4a89aa0849.pdfIn PDF document text
    • http://1ux.site/48471257717r2854.pdfIn PDF document text
    • https://fukubumo.weebly.com/uploads/1/3/4/0/134016705/lalesar.pdfIn PDF document text
    • http://salebox.shop/music_sheet_symbols_and_meaningwpacy.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/bijanel-dofiludibifomo-foxog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5fca053b60d0e.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/7292701.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugofabafomozo.epizy.com/bootstrap_4_admin_dashboard_template_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_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 5068 bytes
SHA-256: d903aa9149d42203cf2b84fa75545fbc92f0d0808878fd71bf07dd79ff1f14eb
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 13340 bytes
SHA-256: 41f8667baa098eb5ce96dec7634c2a1211dc7b205cac5678fca9654fc512d70c

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