Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d80294aa6f0dcd…

MALICIOUS

PDF

119.0 KB Created: 2021-06-19 12:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d46e015e11b25e0ce1b1c99528b69281 SHA-1: 02a25a5cc4c7f83f7cf0c9a6e0c83831b0031034 SHA-256: 03d80294aa6f0dcddeef534d7b2ffd8d8cd07b35ae3b87a33d3d0364147074a5
156 Risk Score

Malware Insights

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

This PDF file contains a link farm directing users to multiple compromised websites, many of which host other malicious PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users into downloading further malware or engaging in phishing activities. The presence of numerous external links to potentially compromised CMS upload directories supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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 http://anhopphat.com/uploads/files/11286965284.pdf In PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160878532d4dc7---12732812871.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/61bdb3f42cf584c52346677bad2a4f61/73114520984.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/76509210320.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/zevetuburit.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35fb8de08f---weregolenisinatakuduf.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/f60feae182eb548f7e8008f979d3a5b1/bovapatunigefipefuponas.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f04ac4eb13---sekafudatitusolafuza.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0285ae727b---dowoxip.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/q1o529goqm6ti1m3l4761342go/35464143029.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/74153631270.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607937d999e47---befodimunexo.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864cb1d29c5---koxuvoxixowavuleda.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/da31de973289f77b20aab5d4fb520c05/52168908310.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/gelarep.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/rpngnnth1j7rp30s9rjkcos014/78142043489.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/jebasoxorerujuvoreritiwa.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/fzgW7-mxBc0/uplcv?utm_term=karthika+deepam+31+episodePDF 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://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 5416 bytes
SHA-256: 2f622a66c714586a4a713ffca24cfe2f911c85bce5abc69329f116e413dd8a08
font_01_sfnt_off000113cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CB 3852 bytes
SHA-256: 02a543877727a2f09610b2501d6d6a3249ed588ae31fb7076aa0e892aa7e4834
font_02_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 3220 bytes
SHA-256: 758246cca0f47e6a784653226cabed4b4a5dff4add8fc084bccd48f43edfaa4d
font_03_sfnt_off00012d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4F 2960 bytes
SHA-256: d3f536b9273df6018773bbd4470967f87d4ec684974ae735dcb6cdc5b22dd5f5
font_04_sfnt_off000139c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C6 47688 bytes
SHA-256: 51148e8efed120dfb3608cc2a8296174f39eadf739e0457c9c10de9f84016168
font_05_sfnt_off00019319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19319 10652 bytes
SHA-256: df0f114b6e81846d421256bf8ce8226ac45c683a203a7e4cc53eefa0ce43a1e6
font_06_sfnt_off0001b7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7E4 5936 bytes
SHA-256: aa7cd3b90cd6d27768cf4fd94b3d1d971935836384c3ff81b839e3d79a2d5dcb

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