Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25c2aa12a6c5949…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 09:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 69b43bae662ae66a1b33af3026977807 SHA-1: 9e11da7c7591aa3aed2ff04a77bd6cf6382df2ae SHA-256: b25c2aa12a6c5949730d38176d2c787e7aee75a91cc1e43fb73a4db2f4e566d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://philabc.ru/uplcv?utm_term=romance+d%27amour+guitar+tab+pdf PDF link annotation
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2096075da2---56100673963.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/vukafovofob.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/89301791000.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9e2c68f8f6bf7070b88c62cecd12c0b6/deramosa.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/fanonodadibesajipe.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/tjukvsus450kmjpc5sjhcpgiu2/74656663026.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/48490271323.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/2107221313442377019727m.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/9188b4d959c0db5681ec2511d3d7730d/dupowerokupuziput.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/gijakakifojetolimuzema.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/dq1cbuitvua8e9siela4rudat2/sowejigusajuduxanirege.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca3fe8b052.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/atg374bmlehvq2fdbd7jns9f47/ronolodisenulole.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0dc8f1d28---57697671615.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/68596081418.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ck6k96t0slbg2ab4nofan1hlce/gesiwaxodosulibize.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/depm5dhtt2arv3p938s397bjol/20369232170.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/nunejakuxivin.pdfIn PDF document text
    • https://tekartltd.com/upload/files/12644960609.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607559ee5b010---xaranojefuxoxuv.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/93828571842.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608201ef7fc2c---zaxederam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 18688 bytes
SHA-256: a7bc93b37e182aa3c1b35074a3f197b7c0b47ee5f042532de5286284592b618a
font_02_sfnt_off000115d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D8 11068 bytes
SHA-256: d173675cbb6e5887f7974bf0db5ebab30b869d38af451658bf97fdc1161073f4

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