Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd0e54ea4c8ffc2…

MALICIOUS

PDF

383.5 KB Created: 2021-06-10 07:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ef7c59f7b3bc026a0efbe0e7b6677413 SHA-1: a2f7aa801d1854b014ee3622fbdab047fc2f5c1e SHA-256: 3cd0e54ea4c8ffc23a90e00a5a2b4085ced2aedb71731c5f8cfaef337406f4a9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites, some of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure and instructions for a password-protected archive further indicate malicious intent, likely to trick users into downloading a payload. The ClamAV detection and ML classifier confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8914

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=baldi%2527s+basics+download+mod+menu PDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16078209539e53---54692849809.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078a0fcb70eb---vojabokisajupun.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/watuz.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/26057582126.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608950efbcf1f---59542182302.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/86624013337.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/0bb7b9idhppohlgdrfgk6is5f3/nevuzuvudoxiwijisuvex.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-1/20210501121540748264.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae005d85b6c---tirugapavuziruba.pdfIn PDF document text
    • http://4bx.pl/public/file/majuvog.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/b7088fe5b5fbf472508ec26508003373/merurup.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/1sdh1rdgrjbgv6hcmee1cfo2ad/tusirajekebiwezelam.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/jasunubunikike.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210510050727.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34a833762---98695198120.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/lulusamilamebumadozopesex.pdfIn PDF document text
    • https://firstgamehack.com/game-1418684922.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off0005ce7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5CE7A 18708 bytes
SHA-256: e153bbed47d7aad302502b0766c61db9356ee63a5f97403e6387f012552e1b00
font_00_sfnt_off0004c92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C92B 38548 bytes
SHA-256: ef726009921489eb92be4ab830db07fd23bd3aa930ec736b71e9d13c20f48bd9
font_01_sfnt_off000541aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x541AA 5304 bytes
SHA-256: 95e82bca2ec98d7bb6d68d6dcd328851cf4ecd905de9c803cc68a7e5859d4fd5
font_02_sfnt_off000553b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x553B3 5148 bytes
SHA-256: 4dbcc85cd001e9b5f017598dfdf0c8e3002acb93ae5b972a16740b51441e5321
font_03_sfnt_off0005647e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5647E 3412 bytes
SHA-256: bb9e27375df5ab1e3dc3312a5bc6e7fb33f1038ae0bf8cfd8239a339818a0f0d
font_04_sfnt_off000571ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571AE 35560 bytes
SHA-256: f3d1489304a1bec7d8e0c55d52dd2e4476daa49fc1043d017c8900b1292bedc9

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