Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6d7d8bce6144fe…

MALICIOUS

PDF

66.5 KB Created: 2021-06-16 09:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a004e1587c1f7bcc1be0092b102d6e6f SHA-1: 7750b9fdfa9146f462e9dfeb30e7e0d2049ed191 SHA-256: 8c6d7d8bce6144fec84442ca4f5fc7dad44232c4c3ae2a80bce506e4ad65ad7a
154 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The heuristic firings and ClamAV detection indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

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 https://drafthe.ru/uplcv?utm_term=open+a+password+protected+pdf+without+password PDF link annotation
    • https://hostingalani.com/calisma2/files/uploads/jufafumexididosixi.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/f6204b9b500913eada57be96640178ad/rebinarifamokonasowa.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e5dcb490e---66618102231.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/dexuzonutavutusoj.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ae1f901f9---25192969622.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3e1648ded---vivufemineroneninovo.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/be465e478e0c97c7bb62af8b21798364/vilatapiwumebunukatuj.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607002d08b781---podapesisimozir.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d84d3a0fe4---gedazogoronatosinonunur.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/3216293308.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/64466297433.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/rujopisa.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076b90bc00fa---27460841811.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6c47aef71---lijabutanizimijo.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/gthlbji5cc3s79t2uf72btbnu7/kopaxej.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/cdehigr2h8f67e2lip09v32ha7/22658815594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 5328 bytes
SHA-256: 0ab144109e5364c13a58acd3dcac127bc5df00a40ff1f3fabd1350900c0a7d47

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