Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6f739278eb5cce…

MALICIOUS

PDF

77.5 KB Created: 2021-02-19 01:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d1156c9063b5f2190c9ba7f0761feae8 SHA-1: dc684397cbf9ee5ddf4fbed87f4c05c16260fd65 SHA-256: 2e6f739278eb5cce763b8e211f5e2f57c3fad0d4db6f961031190d85fccd7369
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded links pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs are designed to lure users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/strik?utm_term=how+to+study+for+the+georgia+permit+test In PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6011ae2409259.pdfIn PDF document text
    • http://reform-st.ru/94554108817vixwd.pdfIn PDF document text
    • https://lovefuzabuzonif.weebly.com/uploads/1/3/4/1/134109130/3378113.pdfIn PDF document text
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/mamunifirub_xapedetalife.pdfIn PDF document text
    • http://mozuganimaf.66ghz.com/media_player_classic_free_64_bit.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/rasoget.pdfIn PDF document text
    • http://salearea.pro/acid_rain_solutionskwp81.pdfIn PDF document text
    • http://mscredit.info/watusi_whatsapp_androidis3lc.pdfIn PDF document text
    • http://texno3ua.com/kassadin_mid_guide_s9rspnr.pdfIn PDF document text
    • http://originalhallyu.com/art_and_the_bible_francis_schaeffer2s4e8.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_off0000f29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 5576 bytes
SHA-256: 91ad3c43210bd6f65c2ab6f96b1974f4e5051a9cc87072452545d53c07ef7799
font_01_sfnt_off00010583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10583 10560 bytes
SHA-256: 40de47dd78980a2e4d880b6fa0daddeb2ea382fe80ec2439789546ce8ee1f117

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