Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea56cb9fda0ef9e…

MALICIOUS

PDF

76.5 KB Created: 2021-09-24 19:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be66c74aa729f16aab48221e6fc5c2b5 SHA-1: 5da19549dab4472580b58a5a4ba59522a4471a3e SHA-256: eea56cb9fda0ef9ea1bf4f078ae8548c915eaaaa245be99a9ff9f787bd2c31b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.anoregmt.org.br/ckeditor/ckfinder/userfiles/files/92696838343.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d1ba8c7c5---dibimipuzunemonuxilit.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/94174746588.pdfIn PDF document text
    • https://phukienbep.net/media/files/78292924887.pdfIn PDF document text
    • http://recrute.fr/files/files/negapefi.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141e00232810---xifedupozugopizi.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/572299d8e3df16b3b523cfd544a1d727/6676404292.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/99836834270.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/banidebaba.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/nudevezab.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/49767537133.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e845fb29cbf15019d79a5d8b9867be97/2946341050.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/69236438988.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/8266908734.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/zonekewumodebisenunizof.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/66260740594.pdfIn PDF document text
    • http://alvitraders.com/files/zebepexumawekomor.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/97650279056.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e8d800b0e---22517694416.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/88298196387.pdfIn PDF document text
    • https://trieurodata.ro/images/file/24162129523.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/63704290414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=copy+favourites+from+ie+to+chromePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CB 17740 bytes
SHA-256: 54b88561f273c629ec97170111ed0e640ff8e2e8e70cabb3f17e733f57cb8764
font_02_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_03_sfnt_off00010ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD5 10908 bytes
SHA-256: 6391e2997f8cdfadb3290f0fde8ae08aecb342dbe3110226565b9e14517a5935

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