Malicious PDF — malware analysis report

Static analysis result for SHA-256 a029fcaf218d37a1…

MALICIOUS

PDF

74.1 KB Created: 2021-07-06 01:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 894f5102ab47cc1b169ab3b7d1eae651 SHA-1: cd37d2b3851468bc67379ef48456aa0829e6bbd8 SHA-256: a029fcaf218d37a188cb62e63b48b4039da3444dc37d89cb72930ad624d415ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other external websites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external links and the nature of the detection indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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://medvor.ru/uplcv?utm_term=young+justice+online+season+3
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beffcd3e86---28070375699.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65f11993a7---bumumu.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b71bb7aab6---12608088802.pdf
    • http://train-in-japan.com/images/blog//file/jutezunubimefeku.pdf
    • http://vervesimuhub.com/userfiles/file/pipujuregalisejetexepan.pdf
    • https://responsible-tourism-alliance.com/content_file/files/xodute.pdf
    • http://sam-global.info/files/file/sizeseg.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e71d06da1eb9ce9773944d3f933ff7ae/64949365309.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/cee55f4e3679eb1d3a2b4377b90c7b83/sasovito.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609414c72bcbf---pevugo.pdf
    • http://pozitron-s.ru/userfiles/file/85295551617.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076adc62d307---zevok.pdf
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/remepedag.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/b0373fb3c72ace31f842b5c3cc1b82ff/xuxituwikomitenokeka.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6e233f177---rojuzusewusaku.pdf
    • http://munnarinfo.in/userfiles/file/fujamagade.pdf
    • http://circuitvietnamcambodge.com/hinhanh/file/55814903303.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe45415889---pamusonimedapupeno.pdf
    • https://avvocatoboretti.com/file/wetenoravoxodetuze.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/40686790044.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6378becee4af885a54cf413a709e0f6a/1642624491.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/a62beab9862c9710573930c47f32f69a/13935323928.pdf
    • http://remobudostol.pl/pliki/91441055554.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf6c.bin
255349ad8ed720983900cc92ba900ea4f21a12815a78d05ae0e19c4bcf510fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6C 10692 bytes
font_01_sfnt_off0000d825.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 16792 bytes
font_02_sfnt_off0000f037.bin
ded50d41a9b70e0687f1808144784ec1a42bb1f56c5d97e52c07442593f14697		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF037 17064 bytes

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