Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb9a65c3cbb95d0…

MALICIOUS

PDF

75.8 KB Created: 2021-09-07 00:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c436227d99ee467d9cd8c5e4dced3817 SHA-1: c56c474e82435a639df3d6c5866b5310656a222e SHA-256: 1fb9a65c3cbb95d06213a50067ee5c647dced42c0a4d121377571823a0b2af95
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The presence of embedded JavaScript suggests potential for further malicious actions, such as downloading additional payloads or exploiting browser vulnerabilities. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=martin+luther+king+quotes+pdf PDF link annotation
    • http://mini-garden.ru/userfiles/file/jubudimumej.pdfIn PDF document text
    • https://securitydm.net/slicice/file/61206789656.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/tumetunemulesejosude.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b58ea528f66---28988655016.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/d2ded8080fc0f7157e5b42d61fbfa368/deviki.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/52517442422.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f66caafbf---23435691339.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/davuwepefefajiw.pdfIn PDF document text
    • http://inphilong.com/upload/files/nepuzorabigopededizamo.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/7837791471.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/fuxileverogububi.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/pubigapipajoravulepijek.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a0862e7fb---14042018960.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081439ebe1b7---tuzevovipe.pdfIn PDF document text
    • http://veribase.com/E/file/siniwikupezokezisuteruxa.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160892fb250a22---meviwuzanizogetanoxodoru.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210623_124614.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073a245646b4---guwulamanigilegupe.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/96732598618.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7a2b9e1ae---85124233400.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/59090357491.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/40111633220.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/84154123179.pdfIn PDF document text
    • 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_off0000c3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EC 11108 bytes
SHA-256: 37da665dccd0ad90eb073610958934221560b88a8934c50769b943057116c29d
font_01_sfnt_off0000dd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 17132 bytes
SHA-256: 53088d02f6a2de7c5838cf2bf146b2e58c1143fbd7ab3db3f492b30c17fe5259
font_02_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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