Malicious PDF — malware analysis report

Static analysis result for SHA-256 518980c314470a8f…

MALICIOUS

PDF

69.9 KB Created: 2021-08-10 20:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 730fc31ea9c978ffc519f84abb87e36e SHA-1: a1be1d8a1163eb578f7f3416edf0d07933ee7aa4 SHA-256: 518980c314470a8f9856761105f297a4968e13206c2c6a598c0aa2ee3ca8e675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of PDF link farm techniques further supports this. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://archism.ru/uplcv?utm_term=conference+room+reservation+form+template PDF link annotation
    • http://asupuro.com/user_data/image//file/binapibifodekufebo.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/76247921120.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e862f616---pigituxaseduma.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/4581401701.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c985cec46e---27136525602.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/l3ugkdg5bmbnqkbagltq1es905/nazebake.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c72c2b9e9a8a87d10bd305ca54e43a65/bivapar.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a247da84ab7fcd8b3f4dd1745912b9b0/29123923112.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/duxutopifanuzotawad.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/93115630671.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/99721608325.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/kimitu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e22a4612b---371929829.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/ninutufow.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/2c45e320c2b2bec36d87848aa2cafcee/78335427326.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/7a3e22b417433c4e857c0ea62be875ea/lolulaxukus.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/fajenikemej.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd621f959---xugimeto.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/nikujusodo.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/72876550453.pdfIn PDF document text
    • https://datajournonepal.org/files/fewurerotisexuperaxelo.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/kekilikirupipateteburefu.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_off0000b415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB415 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 10736 bytes
SHA-256: fda76ca08da9e9a8705c1b8a823bb181c68f61c1e82cf0d342b12dd2942ac583
font_02_sfnt_off0000e4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EA 14728 bytes
SHA-256: 978107c023e599ef154f6f02686681ffd6a1e65730f99489a6808af739ac6f22

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