Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86e2f1b70c8fc76…

MALICIOUS

PDF

105.4 KB Created: 2021-09-08 06:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2388370e467785f29ef1eafdc2672a67 SHA-1: 0147c53a2938cd1fa309a3a2113f594f780cb1f2 SHA-256: f86e2f1b70c8fc76a94ab3b244345bda13584838a38f5962c456ac5f0f5f942c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV heuristic identifies it as a phishing trojan. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1969

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://coretry.ru/uplcv?utm_term=demarrage+etoile+triangle+deux+sens+de+rotation+pdf PDF link annotation
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070a232a2a7f---polugivukut.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/86081023659.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093b10c07bd3---zugipimufibodiroropegak.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/nnrs3nt68me0okg8kt9f8lstg0/76570840874.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6totgrg403gt5majshuh2hclsr/30677080716.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/vobitulafavuvun.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/bf78b2d3b4d5f8b3b48ffa3f61b8da10/14934374403.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/guzovagunine.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/pesofejutudegujuwemi.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/84056870275.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/xabowuxusumadusu.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f47f855411---gogopibeborem.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca02584eea2---62788352918.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/20493445773.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/teqkkfb82822j2efjr6mcj08if/vukepidodaw.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/n3ce6v5l6m0v1t4gd9a7kvedl5/jajizovovufidirasabopi.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094136b2ff3c---luxotegodebowinurokoriba.pdfIn PDF document text
    • https://gulyaskantin.hu/uploads/frontend/files/83206296004.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/jelavovinimex.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/nivexikuj.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/e39d337819e633eaa3d9d5a94e14cfd0/6878186691.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/pexisuvarulasizibagiz.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/10104384295.pdfIn PDF document text
    • http://markone-tools.com/upload/files/javonategixafogig.pdfIn 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_off0001393c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393C 11044 bytes
SHA-256: 0d7d39d378e5b684114ae5470dcb559e2e0fb5ad6d0418624e082af35f8f2696
font_01_sfnt_off000152b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACA 25056 bytes
SHA-256: 54d9af9a5def4d1416a22e0f62c0e194d9f9655bbff3ef42a17c66ee601677ee