Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c28948f374884e…

MALICIOUS

PDF

807.4 KB Created: 2021-06-11 12:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d0f9242a0497c565d9ba3104afcafc2c SHA-1: 2820240ac665287108b0b203f951c751a6f6a1b8 SHA-256: 30c28948f374884e39c29add8f2c79dfc7d971a9047f768210c4eb2132871de3
126 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised WordPress sites and external URLs, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=japanese+grade+1+kanji PDF link annotation
    • http://centurionim.com/userfile/batiment/file/90029434162.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090f4c25005e---8419327027.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/836c2001de546eac0776261b38f77b60/sizotefikulipadezod.pdfIn PDF document text
    • https://afayl.com/userfiles/file/42425970468.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/66158174627.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/ad81443202c2820178b9060b289dd88c/zaxozebeju.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/736aa368f484113c54b65dd8778f79f7/31940593060.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/xasiw.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/cedc3ff58f15e5e315597dfb6a84d502/16517027515.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/42752842004.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f21498c79---46126725066.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a19507fcb776fd07a43c4fe357e4a20a/88332831566.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0a47b02a971711000aa6b923047c3b3c/gavaji.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/xebutuvuvuvapunipuvevis.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/ccf1bc6759b4582b7804454622261f4f/19190154928.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/gufegamukuboka.pdfIn PDF document text
    • http://premium-h.info/files/files/doremifijexopejojapuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001740f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1740F 993212 bytes
SHA-256: d91a020e163e6cd45cc8a568a4b914c351cd75fbf5839ed7249e883f1e37e0e6
font_01_sfnt_off000c5ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AD9 5276 bytes
SHA-256: 7e6cd52ab6f6ad340cb5108e971feb8e1b8413b6b2cee8c6f4f2c69456033504
font_02_sfnt_off000c6ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CE4 9952 bytes
SHA-256: 466405c1398f1c2f8211e6d976d226cdee56c01a2953dccd7ca5f5b846816cdc

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