Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a18138b639e2100…

MALICIOUS

PDF

76.3 KB Created: 2021-02-26 11:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fd24e05eb18e6ba2c60e2a654918cd13 SHA-1: 121569ad862cfafd2822a441f90a6a57039d713c SHA-256: 6a18138b639e21009161c6b8b230c91cbacf1e4832fe0f79bb2d5ec1577acdf1
124 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown reputation URLs suggest a malicious intent, likely phishing or malware distribution. The document body's text, 'How do i contact fifth third bank', combined with the URLs, indicates a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8947

Heuristics 4

  • 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 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://vilenefex.ru/award?keyword=how+do+i+contact+fifth+third+bank PDF link annotation
    • https://cdn.sqhk.co/nogedapuvul/igiig9I/9th_class_computer_science_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/aOWheLW/rovusox.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/pgjjdgf/angie_s_list_customer_service_telephone_number.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/nupipigetosiwowovokoff10bk.pdfIn PDF document text
    • http://akvatehnika74.ru/gomisolutetena7fye7.pdfIn PDF document text
    • http://sallely.xyz/45821795498zl7ol.pdfIn PDF document text
    • http://coolstudent.space/2587344511099wgu.pdfIn PDF document text
    • http://strahauto.website/defexefitedesipuxusok37fl.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/hjjjeeL/pazasiboxepevel.pdfIn PDF document text
    • http://websecurer.tech/unbreakable_movie_mp4_free2harq.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/wisuw/employee_recognition_certificate_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/husqvarna_430x_user_manual.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 5156 bytes
SHA-256: b0e67ba99641e36a7f45f444a5b8c7f0723a2485c364b910d960282bbe3b7228
font_01_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 11008 bytes
SHA-256: a76ebfc17b72b354fe13ff35e81908d463cbaeae26290fa6a02559b96a3aa596

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