Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c41c7c2315ed0a…

MALICIOUS

PDF

124.4 KB Created: 2021-06-20 09:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b94cbd44d041d508dddb079600ba45a1 SHA-1: 9583b8dc8e9e7de4be46af4d7ebbd2c6b0124de0 SHA-256: e8c41c7c2315ed0a70444ae9c1af0d4fc4ea17a5debcb43deeedb14e257ae30a
124 Risk Score

Malware Insights

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

The PDF document contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution intent. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

Heuristics 5

  • 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
  • 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://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/80999736d8bb9cee82ca996bbf83a745/33878795591.pdf In PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1f610608c2e037485bf8dd97ec939d83/3905973313.pdfIn PDF document text
    • https://kawanmto.net/contents//files/42093497833.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vuvexure.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16085b10128827---bomatojarel.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/98562136176.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073090b43740---gelojasu.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/kaudbaibuutb5g8nf3io3k7lhg/65851856941.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/73253944490.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a5528413---54777075234.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/deduxifufexedevu.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/54233c555fe28a2194c0149e094196c8/bejalajufuwasexij.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814fce7159c---wuxodenaxowezexesag.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/17821229725.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a15a3cf582---kojuwigorutabetofadak.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/161d28a86f7a38cc3f1b2e8872c39031/57882423962.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/vebapaketimutemoxo.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/37c901d5ffd059ba5a774d18ec545c4f/sufalevesosov.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/a93bd8f4b3949e94b24a4c58c77e259a/wigikomotug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=kandha+sasti+kavasam+play+onlinePDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A41 10256 bytes
SHA-256: 4892cbdbcc56f0a89d2cf4f877a1208b0885bc3b94f77a54f9334d1c4ef9c83e
font_01_sfnt_off00018c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C41 5300 bytes
SHA-256: 33eed8e75e6fcd04d8ad84feb182e613c32948e58f56b46dd30c837286de50b1
font_02_sfnt_off00019e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E2B 4624 bytes
SHA-256: ef920abc3d63f2ac629045c82dbe45c03fd1f2ec24b006c175b2b63094d3b0d6
font_03_sfnt_off0001ae73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE73 4076 bytes
SHA-256: d16430d45f203829adddf114a045500fcb8aebd05b308bc0d55e811b68aee401
font_04_sfnt_off0001bdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDAA 7828 bytes
SHA-256: d2c1a3f44c70659b2c2dcb0c16f617ba013d401c94233898530b8cd30d1ae0af

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