Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5c389ed74237de…

MALICIOUS

PDF

67.6 KB Created: 2021-02-05 11:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e87ea11bbb1626497d235914302d6c13 SHA-1: 0590c8f8f404610d4b3796886c4963bfa4f60c55 SHA-256: da5c389ed74237de1aad8a787963e779eebd2c78c5e7aebac7c531c2558404d5
164 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, potentially leveraging embedded JavaScript, to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9360

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://maypoin.ru/aws?utm_term=hallstatt+austria+map+pdf PDF link annotation
    • http://coloradocustomelectric.com/fundamentals_of_engineering_electromagnetics_cheng_free_downloadto5sp.pdfIn PDF document text
    • http://steelsho3.club/86082102014wypk5.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/sekukomotusuvez.pdfIn PDF document text
    • http://amorexpo.com/hungry_shark_world_para_pcbch3f.pdfIn PDF document text
    • http://car-test.pro/alexs_adventures_in_numberland8m5yp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd7f35cb116e.pdfIn PDF document text
    • http://present-mag.ru/barrett_jackson_auction_dates_2019jlgbx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_5fd9364652eb6.pdfIn PDF document text
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/guponuvefa.pdfIn PDF document text
    • http://kind-insta.site/vatonukodasiditezakotoou9qs.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/putelekireza/the_binding_of_isaac_mom_transformation.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 5148 bytes
SHA-256: 4526da0aaa937334522b24662280ef93d0889ee644204b5108db3d66f41966e5