Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b427ec2b051ef9…

MALICIOUS

PDF

92.6 KB Created: 2021-06-30 23:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9154cce0fac1abec2fd550a063024d2e SHA-1: 62f83212ee217e73c152b06c3f62f9e6e4a1e25f SHA-256: 66b427ec2b051ef99a4dc785dfb912ef3eff74d94ae6229f4be1d4457bf41d4c
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 a large number of links, many pointing to compromised WordPress installations, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://crewmak.ru/uplcv?utm_term=the+sin+of+fornication+in+the+bible PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8204bf3b0---jegakimefumonuv.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071271f0fe2d---60214518671.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/od7rpgdu6gvvrpo5ksrojd5d7m/kageruforupawurud.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/44868109359.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/pp37cv13e0tbh64cif99c8q1c5/marewasakanudan.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160986cff171b2---72520600332.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/ktleqc3f7a3mqf8rgeus79gvjd/tafukakanalejamipiro.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/38788017272.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/wojosobojiwebada.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/somawobugorexojuzupa.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca931668dc---35667440540.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e492def916---28950735064.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/p5qq2nj6ica8ras4ao49om9tid/fubobevu.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f247151b8fa51c713fab8444cbc2bd88/58917618068.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/gc90vtvb6t9m5k6sh6492bnhmq/67653891020.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/tasujesiwajomiduwar.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/96674920447.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/42168456140.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/32c8b5fb6c16afacc25240f873a918dc/80871356731.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/nijika.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609c46ab7f3a2---gajusabirofigexixisofeno.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a2270e6d5---46882924250.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/23601148166.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_off000107c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C1 10536 bytes
SHA-256: 8a76c6dcfdcf500f9c07b9a4390c3cc460042b15b876a9f01ee347563be37fd4
font_01_sfnt_off00011fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 16760 bytes
SHA-256: 54e2db44f28feff968e0838e11691e5fc7561872e8cf5562d97dcec75054593a

Open this report in the interactive analyzer, or submit your own file for analysis.