Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8242e21194448e…

MALICIOUS

PDF

69.0 KB Created: 2021-06-06 19:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4aa2c2b2d5ba52cc3a41aec5067d6763 SHA-1: 52a49bbe273c0ecf9779acc78e88619595422603 SHA-256: eb8242e21194448ef509231d050e96e392d4ddbd8e96b8d088438aa85e0f55c1
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing campaign. It functions as a link farm, embedding numerous URLs that point to compromised WordPress sites and disposable hosting, likely to redirect users to malicious content. The document's content and structure suggest an attempt to deceive users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6540

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
  • 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://smidgel.ru/uplcv?utm_term=elementary+english+workbook+pdf PDF link annotation
    • http://angelescare.com/userfiles/file/68218781302.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/7cd8407d17d17523a21beba4e0a7aef6/61624039632.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608031d0e312e---pazukajok.pdfIn PDF document text
    • http://jump360.co/upload/files/20210602151416.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/8ba65c09b0e167f7349430fb60d0d582/wepazetetavufumeguki.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65cba2809a---61109330107.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/7dbp3tbjpnq6ib28bkqffud9d3/mupidal.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/662e676df530be3b444d30d080cd5e5f/4708176388.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e402e1c74d54c4dfec145765e5b36071/mulaxafewezonabozomas.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2745ed594500489ad3e9acd777a64355/26657154746.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/97e33461c492320d76b46bcf65db4c07/xajumusigawoveganaka.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/f0456fcb482c76c5cb8989d61f2d6d96/49801480143.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/272c48f61811188dd6434946b3191e0b/kovekifogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03E 5600 bytes
SHA-256: d5d00f7d5f3554dbb600f042ae3c389b0190556a79a68834b16af17e26ed9023
font_01_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 11360 bytes
SHA-256: c007251dd5ea186c67fe568fb8bb5ade7c3baae85de7626877547814087cb5de
font_02_sfnt_off000108a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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