Malicious PDF — malware analysis report

Static analysis result for SHA-256 7248fd6e6a81d1c7…

MALICIOUS

PDF

94.6 KB Created: 2021-07-30 23:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fe2de22542c62c9c83a18fe86f123fc SHA-1: 4bc48dd1e583e615faeb6b44e3e8faffe34edb4d SHA-256: 7248fd6e6a81d1c743a8e0013df1f9cd8d735b1a2533c2bb4c5f1e8ef63bfab4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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 http://iccj.jp/images/uploads/fckeditor/file/vuradeliwuzekumuzo.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/b1711345b8983a5feea09b6cac354613/kivorozevakozapoduw.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/500f00912070b0df3173a43ec40b1d4a/devizafitelogisusajubovi.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/1eb1a9d4c17a26acfd45feefda710146/99642520874.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b2e7198a3---53787339026.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eca5c1c1e.pdf
    • http://location-venise.com/italie_documents/files/jitodug.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c679b51033a---46353188651.pdf
    • http://gourmethousemacau.com/UploadFilesfile///71962367407.pdf
    • https://armagedonspedycja.pl/files/file/61311623305.pdf
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/14861818655.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b96013483---40879097317.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/c80147cd89febfc041d8ec691cff3411/wipenumeposaze.pdf
    • https://aimtronu.org/userfiles/file/21215794153.pdf
    • http://soflocops.org/clients/83264/File/lotirekuxob.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083923f40795---lepipafemosilu.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/p6n6oa06inllqt0pionom4gh13/lifolewepetoxomu.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8c7faa33abf54584c1bfdf7d1e43f7ed/73375055681.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d465a28f718---7548682908.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/8edranlfng8e17uj0rd51jpl92/niveju.pdf
    • http://terralindahigh1981.com/clients/866868/File/gesanulimiwana.pdf
    • https://abe-rdc.com/userfiles/file/sazabelodapenilepa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=kiran+bank+clerk+reasoning+book+pdf+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3de.bin
e97580ba357b585713f2eb18b2229220dae699b663d16a2ea7bcaccf96725841		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 18040 bytes
font_01_sfnt_off000122d2.bin
319c1d6b5a9dfe45ef2c311a2d5ba00a192ff2e3c7a2103ac7a27dba584f9d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 16144 bytes
font_02_sfnt_off00013849.bin
a9d16955b8e48e78d380eede8b963e3f903ec8043b280d2ee0a7e94879b8ff03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13849 11004 bytes
font_03_sfnt_off0001519f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1519F 16792 bytes

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