Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec5c231c25186f7…

MALICIOUS

PDF

87.6 KB Created: 2021-06-27 01:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c395c92d879c6c3177fc550650f3edd7 SHA-1: cca6a22bff331bb7fe5f40e29ba6f6c27ea8d6dd SHA-256: 0ec5c231c25186f71057c20c95b54e792a202fd16c8b6a7b6aacdb939b8e77d9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggests a link farm designed to redirect users to malicious sites. The 'SE_ENABLE_LURE' heuristic indicates the document likely contains instructions to enable macros or editing, a common tactic to bypass security measures and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=how+to+edit+pdf+on+mac+preview PDF link annotation
    • http://gostinica-domodedovo.ru/files/25259816847.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b56cef66f2d---suwepom.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/mv8kbk359edanpqph9bas5pdds/vusewuponuzejusujogawifo.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/bawikojar.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/87fc15eb1e9e2ab6f738d92edf6b0eb8/12547349924.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5b97a257f8a48fc379e4c5b296c5f348/nuposisurimiwutokolozame.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/zareduj.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/98540082750.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982fa99a642---tofaninebozun.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7c0a1062a586ed38a27bd88bf5eb498e/kaxebuxisidupene.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/u3qbco6rh2qedg8lip6rffm5k0/wetumudowumexisemarawuvil.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/keditakuxopar.pdfIn PDF document text
    • http://proxima-design.cz/files/file/nunenageget.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e881432624e0056a16423cb352bfffb/22435610080.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ks411bi45hukhujl5mq6oiqkn6/31344170225.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/hsnbtsehuhq4ism9j02hduvov3/777638582.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e3bdde04334e211a5c4b30943c5ca51f/1687153446.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78225526719.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/5710269709.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/duvi13pqnjv5p844dt3ghqm832/lunejine.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/desaxipefibam.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5362a3f9454568977f5a8bdce41135ca/dibowomajigiku.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/kakolowakafawijesadegifuf.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/bc3h7p7lh2hp1j8k58bt4sldk2/13026848419.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 10708 bytes
SHA-256: 24cdb31b2098b38790e49e778f009d077b9f1bbb361587952e7a94f5d1b17e92
font_02_sfnt_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 17364 bytes
SHA-256: d7391c77e96ce4a95420200866befa797bd0dd0b451b383d6417505d9952e139

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