Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db9a09b79e0df26…

MALICIOUS

PDF

98.1 KB Created: 2021-06-28 07:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ca751f4836ce1c91de81fdfcf9eb5dd1 SHA-1: 83e71ea2bdf56e29e611bd04f40ba2a5d18490a7 SHA-256: 5db9a09b79e0df2620b519c41e1b65e3b89eafa94e256c60e59a9581b0d24b84
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The file's structure and URL patterns are consistent with a malicious link distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d61056c95cf---vuzuxubivufimaxememev.pdf In PDF document text
    • http://ei-windykacja.pl/upload/file/24382819534.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607765e95f42a---68752258470.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b52a2b8ab---94784293078.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/cc1f33e97d2836c7e295d42e46c4d64c/94972998184.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/vstolteqgd1nd6rm156coj09j5/mekasowaguvuzatuxosodis.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/80263560741.pdfIn PDF document text
    • https://exporoaster.com/app/webroot/files/images/pages/files/89605157979.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/14332544130.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875befe1ef5---gopetewebufuzonafipetuked.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abe3032e176---dupudafinefexekanifo.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad70971e3f---98337780128.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/guxewemona.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/0039ff14b98ff89805dec29645ca7cd0/tazawuvokat.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607280809def5---fuzin.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/6968442938.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/l4du94jfi88929ido87sjtlsgh/25929609563.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/55383234734.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/wanebivobete.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/cim19ond8nj21o2fkc741vb3kp/70187612373.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/ccb6b7f6d62a1ab8733568b70681ea65/82429228994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=comparative+of+friendlyPDF 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

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_off000112ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AD 10700 bytes
SHA-256: 1b3c4d3b885ce378162911c485e55060125cacd07e39d59c9717e469d4613574
font_01_sfnt_off00012b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B39 22348 bytes
SHA-256: 98b92237fe42eff507d548388f46a708047d31d03850d3ce02427a2f681dc884
font_02_sfnt_off00016365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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