Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2d4eee7418b8b3…

MALICIOUS

PDF

89.4 KB Created: 2021-08-12 00:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fb30136ef0b4b2dc1aac928c55590aa8 SHA-1: 813b7bf33898f993fa348a01b005f7d62650ee01 SHA-256: 9b2d4eee7418b8b348f8d6bb837b18f17f75f0ac655462e6d3c52dcfce7692f8
164 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, forming a link farm. This suggests the document's primary purpose is to lure users to external sites, likely for phishing or to download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=mardaani+2+2019+full+movie+watch+online+hotstar PDF link annotation
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/90715468605.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d5655bf238e93ab7c22fb560d849c380/nozabusagudokegilizumelin.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///vadorixiginexoxawopew.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/25629284793.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/41033206370.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/epiqfo9gltiorpidoo729hv8l1/55394422309.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/a3828b7a0ad5dadb21d9699956638f61/vudowodimavo.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/e0e6f228c569fbddcd1a2fe9ae087a8e/vavijinolewo.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf03daabc1---tageragir.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a94639fbee---mokulonijobaleketero.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/lubiwarigevibujiwo.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/gidomofa.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/nonomazosovi.pdfIn PDF document text
    • http://moristas.com/userfiles/files/51791892222.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23684859cf---tuxanozusomegog.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1610ef681f0db2---58537659048.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609288f4a422e---56535877784.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/40687276749.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/89884736234.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/61884020726.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/89d5e99e082e4bae20c5d2318a7e0140/dimofazaxisotibonurepa.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5e6e1248e2d51da04d30b23371c4a075/36779194740.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/5b3400cbd6d7f58e480e3d88c0efd081/dejemad.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_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 11448 bytes
SHA-256: 91afbf59fa3f0889f2e0ff2af33e9903ec42c0898d7ac430c35f60c0793acd58
font_01_sfnt_off00011164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 17220 bytes
SHA-256: 27d7f71ac3cbc4c622e6546eb38200a53c2b7bfe6ee07d3792931bfcd1331f70
font_02_sfnt_off00013e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1