Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c6452ad734b21f…

MALICIOUS

PDF

53.1 KB Created: 2021-03-14 15:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 46a1d5b4b9db905a7134993e1ded3678 SHA-1: a9ca52d952b8439b84c79dc56945582d7a700b12 SHA-256: 31c6452ad734b21fc85524bc765ca7ed8b56a7a46a5be149349c7b29273387e6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7008

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
  • 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.
  • 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://baarspo.ru/award?keyword=amoxicilina+bd+bula+pdf PDF link annotation
    • http://rgtuitp.ru/accu-chek_compact_plus_test_strips_51_eachmm0g9.pdfIn PDF document text
    • http://securityverifiedservices.com/bolelixigdtqxu.pdfIn PDF document text
    • https://muwozijazi.weebly.com/uploads/1/3/4/7/134736858/2773649d7c7a1.pdfIn PDF document text
    • http://dirujadejefogax.iblogger.org/rorodugatojenibinob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485014/normal_5ff3112f8ead0.pdfIn PDF document text
    • http://osmosiotzs.fun/hungry_shark_evolution_dinheiro_infinito_apkw0wwv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ff8939ca5eab.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/igje9jg/download_we_heart_it_premium.pdfIn PDF document text
    • https://lorerepurukese.weebly.com/uploads/1/3/1/4/131453396/9bd4c9ae8064.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/Phd2Wtu/90607397091.pdfIn PDF document text
    • http://new-volosi.ru/60055112141q6zxg.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/2KEjhsd/79007266129.pdfIn PDF document text
    • http://axecheat5.xyz/blackberry_link_software_for_pcn76i4.pdfIn PDF document text
    • https://bojomuse.weebly.com/uploads/1/3/4/4/134462584/8000173.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/ibUjcge/mujonixowezaxu.pdfIn PDF document text
    • http://xemajerekagow.epizy.com/balance_sheet_explained.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_6e9a31506d5a40e3996291a44e27a9ab.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_34215f4aa6d64512a5aea257bef8566b.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_c72d4b306c4c40fd884fc400d05c792c.pdf?index=trueIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_ed085de871bc4ff49ad8aff46b08145e.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_ad4d9293d9f744dc90f0d31e4fed78c1.pdf?index=trueIn PDF document text