Malicious PDF — malware analysis report

Static analysis result for SHA-256 63342a223aef93db…

MALICIOUS

PDF

79.0 KB Created: 2021-06-21 05:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ba9f880f1a8872840047ac6608e77ff3 SHA-1: 14edcc4751c95e2ed9b09f0fa4075d3966ecb3e5 SHA-256: 63342a223aef93db0319aaf0bb5d220532515bf99a82912fe2eb3b5bb85a144a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to websites, many of which are hosted on compromised WordPress installations. These links likely lead to malicious content or phishing pages, aiming to trick users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6734

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://wastran.ru/uplcv?utm_term=ramanichandran+novels+list+in+tamil+pdf+free+download PDF link annotation
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6380e57050f879d7a937db3da13d1055/84083354299.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/pikeredenitobukewatigise.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/48714425769.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/velufukejejilowipira.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd9215b60---61492158849.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/8c1b914c82525fcd12111c01210a7996/77672660207.pdfIn PDF document text
    • https://stopserv.ru/files/file/vorazixubejowum.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/v7g6i75h38jqknrd2i8i5999e4/37748933258.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/72697187195.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/p5grkak84a6ggg77c3pdvdtk60/bunesufipa.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b7eaeb05222879b4ddd0178f25d0b9d6/sataz.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/245351e0111466c8b05289c484476d39/sixenopego.pdfIn PDF document text
    • http://kiemtoanhaiphong.vn/upload/files/fatenozafapodobaxakoteso.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/golapalo.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/5550954778.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae86d7d13a---sadexisaditibixigiv.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f631.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF631 24100 bytes
SHA-256: 69f43da97bf16f47da3558fe9ee135dceb9c77a097b0286a8dddc99c3f7cdff2
font_00_sfnt_off0000e42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42A 5344 bytes
SHA-256: 258d27a1f09eb43d055faafd85064a2ad8fa84269f3c0c0c881d37dcaf5ac33d

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