Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0be6a8a5c269b1…

MALICIOUS

PDF

73.2 KB Created: 2021-09-25 05:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7459ed5ce6d5b6b786e7df5f5602253d SHA-1: e6f3815a0bee8a7211eb1e95dad120f6a23972b6 SHA-256: 6c0be6a8a5c269b1f2c899336a622245658562bd71fe2c9b78d975817555bf20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://cahayaapi1.com/contents/files/69178657256.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/dqdsit6krpau0opiq576e57qt1/sedagogawaliwifutomotesud.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/zosil.pdfIn PDF document text
    • http://cafesca.mx/ckfinder/userfiles/files/rosovemekajubesufemozo.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/vogutigodatenufokabag.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/magunetumusawememuwaba.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/repanawuwulawut.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/41475119324.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/91241085796.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e94b95858072b438492b50d16f1488a9/bosebosesiludonexe.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ef1n4liucoqfggvvhsrq0715lh/pinaxetuzar.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/lobasoduzesaxo.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/78384956066.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/78240548128.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/kilebexud.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/89114402093.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/38705325041.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/newabex.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/lugivawazejolorunu.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/kasozomuvinuxozepiwowaz.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/1597780651.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/83387775300.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/runulafogupowem.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/dipekuditavubekajexef.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613405404214b---zatop.pdfIn PDF document text
    • https://atlantidegattico.it/file/dujojuripomugefigiraje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+do+i+cite+a+photo+in+apaPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E7 10376 bytes
SHA-256: 745c3998f2cdcd2f7a62f2bcd0bcc3923ab24193ee6957673768e9aaa5d222f9
font_01_sfnt_off0000d147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 17716 bytes
SHA-256: b20b9fafb6cec097a8367f814e7ba1dfdc1d2b812eb2fa548a0b2d18ce153af4
font_02_sfnt_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1