Malicious PDF — malware analysis report

Static analysis result for SHA-256 a609445816c8433b…

MALICIOUS

PDF

65.1 KB Created: 2021-07-03 10:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 68a6c6a8d76aa1c70d39718e47f7a9c9 SHA-1: b3b2a7d723147defe8aad548fe041dff56f2dbeb SHA-256: a609445816c8433b12a0f5cb99079e42dfa4b332c5bf2e47ed8f7c46e752fd4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8087

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://blesk-stroy.ru/userfiles/files/dogobubukejaratu.pdf In PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c934d7aa436---61221585620.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/g54psk453oqrinuernre122c83/koxumed.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d4a700075---61050992305.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/mb31p6rqlcjv4gtrq1odbiindb/wegonotomutirekojereg.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/givitidexoze.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/18480972256.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/lakowipofo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8ec7c12e3---moloxomezusukumiwupepitok.pdfIn PDF document text
    • http://azizolace.cz/images/file/77012273645.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/nojadasofi.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e8c66bb8---rakejedubereve.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3281f820ee---govixabonejukatiz.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/2792362116.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072a3a363237---xilalokam.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/82ba5749f8041f772e897b9d137aecff/14900499085.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/j57lutm1d2g1f5urqut4i4k5d5/nowosum.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ro4canm97npqbq00jq1j9uv0v3/kodolexuzi.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/94850655673.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/wavuraduwakexizuf.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/fa93b69e8c6f8ba54514742a18d66181/rowuwatumujog.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/126bbeb9a7610a916010b7624d6717fb/70471129951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=jee+mains+previous+year+questions+of+atomic+structurePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c

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