Malicious PDF — malware analysis report

Static analysis result for SHA-256 2930a6d646b769d3…

MALICIOUS

PDF

90.6 KB Created: 2021-10-08 21:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3c2b90403fcd02fad6b1694f3d09db4d SHA-1: ad93bd505546e244299968ba6655040bc022e714 SHA-256: 2930a6d646b769d3c73dba04f5d13b6db4b0172a738b0b3c33d5ce441d539d33
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=mind+full+of+thoughts+quotes PDF link annotation
    • http://www.tivafa.hu/upload/file/58365011137.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/nopewevazekuluzi.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/fufarokolobutevunuka.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-22/20210922141214812274.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/26648241528.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/30917877822.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/govirebogitakeg.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c221ea59836d960f49ecc364b7c634d5/92371555760.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f305aaa0e4---53786797320.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/vinusatixe.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/21185081350.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/98440682874.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/gelisawibaze.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/vubagapogopu.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/99548404281.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/vekevulo.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/fokelolipubegewisit.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/pfvqcn5t99cbbdcq9kkd8r897l/64506427324.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/93912232259.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210929_3067026C45EEADC9.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/21121738912.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/3246423044.pdfIn PDF document text
    • http://iphysiology.ru/upload/27702910766.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/digefa.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_off0000f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 10612 bytes
SHA-256: 3306a0fcf487df3c28983b592a48840c8ab7ffa27a32cf120a2f54a3a17a1cf3
font_01_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 20164 bytes
SHA-256: 93b56728e84a2f2c11888f7594c512be41ad24030107eddd50617da9f369facc
font_02_sfnt_off00014518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1