Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ab0ab58efb0421…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 02:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e057110525dfc946c7c019c8700a86d7 SHA-1: 3d1750315ac1525cc33c74dbbfa10cad1faeabe5 SHA-256: 92ab0ab58efb0421aceda6c239ea1189a6175f7594e83010d38b8db2b3ba2153
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to websites hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

Heuristics 6

  • 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.
  • 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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6b0fd7ef7a3acd9ef5399a59e2354eb4/kebabosafudakeminaseva.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/hnsu7vf90c0luflek5kg3ctlt5/56467903771.pdf
    • http://hiddenforrest.net/clients/76790/File/51196760685.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/203ff29cc23160e023a36ff8cc7f292e/mokivogu.pdf
    • http://iaestedresden.de/userfiles/file/95358809849.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/97abe08020cd472acb7a8717de1b5a74/54607560563.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/420fa05123293fd2112f3149ddcf1d52/tekumumotoxinufezilamada.pdf
    • http://asustainable.com/global/file/ribapidova.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/343uojcd0nola17fl2rn4g84dj/befofof.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f56f39ab68---37769829580.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/f07f2f995b0d20e066093789d2407ecd/78615976859.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b61b3df08---25859712788.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088843d69212---tuvuzesoperuzasi.pdf
    • http://ranaghatpchsschool.org/userfiles/file/37305727664.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/1d53749256481afca152ceef53403cee/gosuxefogamelikogavune.pdf
    • https://diphong.com/uploads/turogugofumawuse.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/mofejidujejedup.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/83p8n21u2uls9au8n8rem3k080/kuwivedi.pdf
    • https://study4student.com/cache/fck_files/file/wirutadijavegudoruseveze.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1285a5e1e---48045055983.pdf
    • http://visusmarble.com/images_upload/files/72868076741.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/xugetevivagezaf.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609172fb035cd---29323734483.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=my+puppy+is+biting+me+hard
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c1.bin
ac694184ccf94fe98c1eee7740bf137db60aa8300b7c551537c641096f586940
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 11020 bytes
font_01_sfnt_off00010bc2.bin
3552b5426fb899835fcb3138d7d7b44642dd5f3bb3f25df18d42960bc61fb190
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 16812 bytes
font_02_sfnt_off000136de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136DE 16792 bytes