Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9563d884c726bbf…

MALICIOUS

PDF

71.7 KB Created: 2021-06-30 12:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0222b328ee46176a2d979568916628cc SHA-1: e1d1203f8ae5ce9111de40a56ccbad3ba91a2be3 SHA-256: d9563d884c726bbf558408e918c64b9aaa4e6af8ec9b943e1da7289a942abb9a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous websites hosted on potentially compromised or disposable domains. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c692425c13---bibefesekemiwolevobidoni.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/e5788ae49cf60dd73432059f6da7ce9b/peliwixusarokor.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160940812d6f4f---83975037484.pdf
    • http://mientaytourist.com/uploads/files/gijukowamibu.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf18d589891---nulefomizabobu.pdf
    • http://huiking.cn/uploads/file/171225281970.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/5218e86ad17fd388e23a2e26a02ec31e/8682193082.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/hb7st0k2vjlmqr2nrb1hu0egj7/puvudumuwemupa.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8f40f0c04be0365f716f8636e32a0e6d/21517563121.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dbb204e26---86544799954.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607812254511c---22862603325.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b8a3933d24b8e4eb481d5a5b80f7e749/23321077376.pdf
    • https://ubranni.com/uploader/files/11550290913.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/zuzamugokegitezikibig.pdf
    • http://hocikto.info/userfiles/file/zotizagubibexazaf.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d93224f693965e795b1f13ea2120f713/nunozavanenapo.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092b366eadfd---93305051021.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86846c64e2---pilozivilabadavuz.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cdbaf4e81d6---fimokopat.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903d3fd1e2c---deruwabaroti.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/dixerufonerawemot.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0766141c7---jedefuvugiwuwejugedofu.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5cc6e73742407cbafbd4af6f96d0d8cd/34424732808.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b8faca609---59396749354.pdf
    • http://apvn.info/userfiles/file/43352348809.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea3c430fc4---17969846513.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=50000+rmb+to+aud
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA96 16792 bytes
font_01_sfnt_off0000d2a8.bin
f481f371c0066a16b09103c312d29dd8db2013b19a4c65abab536cd4673459c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 15428 bytes
font_02_sfnt_off0000fa68.bin
d52df5911cc9a1ef84e6cd149f25d960ace1773e46b30d7400860daeff27493b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 10268 bytes