Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a269e3ce3893943…

MALICIOUS

PDF

108.7 KB Created: 2021-06-20 06:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 48af62d28402e5f92d2849e4d29b1baf SHA-1: 6e07e432b0b14155e10a62350ea53edc6a80bc5c SHA-256: 5a269e3ce3893943c5ae330b0d35dfa0eef2707e3567c8771a2c20a31fc12125
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document likely serving as a lure for users seeking free downloads. No scripts were extracted, but the presence of multiple compromised upload links points to a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/68c1df3dfa50b40735337a88c037b318/jupezagasuwavefawulidod.pdf In PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/da7d8fef3d4351e1f9a13743a85e1970/41089052328.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/6cef71ba7f04615c32bdbecae36ff144/dowiwoxi.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/folezugapiwizixedaxigaliw.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e320a49a80---wenametasemakep.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa08a16932e---7052538287.pdfIn PDF document text
    • http://talleresjpg.es/img/file/lodenoxiteninikomegovabo.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/vuviximawiket.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/jofetutomifani.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae664c27cc---wavege.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/55137806033.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f3e87dbab---lazopenumonesix.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/28916035344.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/06ad049d108adddc07589bdc0c556b96/jijolegofuxerikoruvemuw.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/logokan.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/muvonilofatonotezizuwa.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bharatanatyam+books+free+downloadPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00018efa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18EFA 5500 bytes
SHA-256: 137551daf3d61fd4a303ce203a63da1dec4525b92ac63533fa4f251ebd2713c3
font_00_sfnt_off00013db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 5596 bytes
SHA-256: 57d18ba7a5f2eeeac3ace521be88d1ebbda2a68b16d45a0c0a1f71a59c154b23
font_01_sfnt_off0001509f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509F 2792 bytes
SHA-256: dd5f29cf9d75ca000d6644818bb6d7ad7c11a694d63e16277d7e464d68c57180
font_02_sfnt_off00015c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C08 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_03_sfnt_off0001676b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1676B 12276 bytes
SHA-256: a8c52c88b0ce7c9e26fad99947ba3810d47910e3c44cc8fb0afa93782951f313

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