Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fe584f4bcabdc7…

MALICIOUS

PDF

63.0 KB Created: 2021-05-03 22:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e4bafec849f5acaa87d6e3eebd133ce SHA-1: 62aed04465555c2d2300f65935cca92e7f308829 SHA-256: 95fe584f4bcabdc78deacbfcc6c4aaa5381cb0706f672c443b2776dc181dc81e
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links hosted on disposable domains, characteristic of a link farm or phishing lure. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious websites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

Heuristics 5

  • 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.
  • 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
  • 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://pelibifir.ru/strik?utm_term=brinkmann+smoke+n+grill+price
    • http://sevoxotedeki.medianewsonline.com/ashrae_fundamentals_handbook_2009_free.pdf
    • http://sugalomiwuto.getenjoyment.net/pdf_to_word_ocr_converter_free_software.pdf
    • http://rm-swis-mine.com/6467375323638pwx.pdf
    • http://xonitaj.mywebcommunity.org/96490514952.pdf
    • http://top-salez.site/2264717810626y4q.pdf
    • http://guwaxata.iblogger.org/22006722777.pdf
    • http://zutatowatipo.mywebcommunity.org/96538394728.pdf
    • http://sovuxofi.66ghz.com/22099515665.pdf
    • https://s3.amazonaws.com/bufipevuril/airline_industry_history.pdf
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_8d21ab0fa0f14b4e9d48c5156ac16d75.pdf?index=true
    • https://s3.amazonaws.com/libusamagowuvo/95451592268.pdf
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_67f5343c017248b2aaa63fde4f42a839.pdf?index=true
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_8b352f9909c344be9640f412b2fd9609.pdf?index=true
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_124c8332588c42eda81a49e19f4555f7.pdf?index=true
    • https://s3.amazonaws.com/simujix/comment_apparaitre_hors_ligne_sur_whatsapp_android.pdf
    • https://ecad98c5-3f79-4b5a-9309-7060426a101e.filesusr.com/ugd/66ec94_e3d7d398d06b4abab00740ae3606f3dc.pdf?index=true
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_f452b8c63401466a8ee3176240ef20da.pdf?index=true
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_134fa5dde9b54970bea6b99a55d0031b.pdf?index=true

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57f.bin
0dcdeb3d738d5362190ae9e9c812c4f982bc56dcc0a8da0f4dd6ea17c2758ce4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 2872 bytes