Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca0b38b30fc2708…

MALICIOUS

PDF

94.2 KB Created: 2021-07-18 02:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f4367c368a13f7d38aea2e57c024878f SHA-1: 324f5a55656e4218f385e30614dee0b7dd7e2ff6 SHA-256: 0ca0b38b30fc27088c455292db20b273abc0556f1e95cb022b24c326fc83f578
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://winpoasia.com/ckfinder/userfiles/files/bimubotif.pdf In PDF document text
    • http://africa-emergence2019.com/userfiles/file/bozisi.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6985c12c80---basaserelur.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/rabaziduwowupuxofuzodi.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/9bagtg8uq3cf17393iird18oc6/bokinoneredegagu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607697b78994d---jutudeju.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/9141551533.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/v1582aeadinnc3k7uas0cmdd07/30845170827.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/ffa1e21f21d31cfe765e66755966d6e7/xabakeniwa.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/3fa6af5f5d4bf4f50d459eceef8a565b/52770687543.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/pagozaretim.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/6c7e674bfba49e216adfbbebe1dad9e9/zepifilogiweradunotukebop.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd9bd44bd---guvunerozoxe.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/nizibijodigobewuxizojexe.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/3768fb020fe81eb805c32866384d02b9/fejatafogu.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/71288438830.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0d61aa3c6---4676327956.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/dadeda.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093b3f0b7fd4---13518867603.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/55000402029.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/2886848833.pdfIn PDF document text
    • http://hongdacable.com/d/files/wizulobefedigudokatumete.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071017d16cf4---47263800780.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/dd6c0275fd15f338f6659a22c05c8be9/zisupebokalusonigavuk.pdfIn PDF document text
    • https://lea-inc.com/wp-content/pluginIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=country+music+hall+of+famePDF link annotation
    • 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_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 10848 bytes
SHA-256: ca0d0c248a439d2bf2a04b3ffdac686455f6322ee528f71713b56e916da8968e
font_01_sfnt_off0001246b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246B 18028 bytes
SHA-256: 55c0808f387eb379ca9362c74af5dbddd63145180682b48ceaa00da2c1774dac
font_02_sfnt_off0001536d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1536D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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