Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee08da471950e87…

MALICIOUS

PDF

87.5 KB Created: 2021-09-09 14:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 55dd3b9db9314de12554f5f862f2baa6 SHA-1: 67825fa666e10cf2db1e35f487ba20313718dc80 SHA-256: 9ee08da471950e877341bdf7be37fe73ea177dba0d64680b1b8d95e1ad05c62c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/6a2b37194f63b7ff0176b6eadeb79a80/14423245119.pdf In PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/edpl11b4oudb8mloebnlfagrpt/zewaribonesanupol.pdfIn PDF document text
    • https://kar360.com/resimler/files/zaroxaraxusisijikukabivu.pdfIn PDF document text
    • https://12waktu.com/contents/files/xuboraferi.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/tepulil.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/zefumesawat.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/xidekuturaw.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/wuselugirewosibuve.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/40251378252.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/dawizesib.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/83684956051.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f502245473---73935650742.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/givaxosujesapufut.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/bumojawogamomegofo.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/pumukekeroritikelatiwege.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132fb8f18796---votowowanafi.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/dovidunifoxuwabevedupazi.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/fojozetibo.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/gutabovaw.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/nirikusijururuj.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/40841494119.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/sipobem.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/58405183664.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/08/lanoxigofakowarulo.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/090748148755.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/29555475455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=in+display+fingerprint+app+lockPDF 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_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 10952 bytes
SHA-256: e320dbcfcc1da9498b86e554c62c68a029fa64bd279e8076fa550fe070e583d6
font_01_sfnt_off000106eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EB 18948 bytes
SHA-256: 401d7d54a14bfc4a6b19a8ab77f6a849e264cec48dac16f035234f0ac4d3383b
font_02_sfnt_off00013818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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