Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1248a0a936c80f…

MALICIOUS

PDF

88.3 KB Created: 2021-07-22 08:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7a3c60428a1199bdb5aec4420a5e8b7 SHA-1: 8e55ccd24edb53caccdf91ab93b1af8e3d93f265 SHA-256: fe1248a0a936c80f677410ad38d6f2a0f7aad893183140e945c4d3b07695a73d
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into phishing scams or malware downloads. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://agavietnam.com/img/files/nodabebamiruxisedafikipa.pdf In PDF document text
    • http://op-gold.com/ck_image//files/depawefali.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/juwazojuzabupiwujenilixu.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a15b5d980---jukexukan.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/b20bf70453764f28df8d7e46c7e48265/52554029202.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/14074026112.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/42m6v1rpv1qnkfdpooniovurhg/58757661415.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2f0b0a32---61277621072.pdfIn PDF document text
    • http://lucann.com/Upload/file/20858413385.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/b47a367c0a249764d31aa5f700f426c9/66646478221.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc3245aff8---fibowixawefujegafugo.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/99927129409.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a25a5c97e99---98319192327.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/0c98b36e9415d3061bc0cbfe6aaaa2cb/18954787491.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/lemutexes.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/noveteneg.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b94001490f58b32c3d80861525105945/vitidakufotadujatemen.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/gosagojibunibufirokaso.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607386706d1d3---pivubajabekefo.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/1it93mlbn1r67ld87u0k8t7tca/vigejijuvit.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/71286589990.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8053a4d4d---dowagaguwibewodub.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/67gncltqfraogc4junki9dqmv4/jeveta.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/62642304301.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/81831736709.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/fuvumexiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sing+sing+with+a+swingPDF 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
    • https://brunch.co.kr/@zoiworld/89��������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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_01_sfnt_off0000f1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 18320 bytes
SHA-256: 6b94fa322399bfd11ea6f76b37190c9f37512cd8e38a2d58c31c72fccb105c7d
font_02_sfnt_off000121a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A0 10148 bytes
SHA-256: 2930cece187337efffd54552fca1b194d848a6eaea6c4c6738ad81656243ce49
font_03_sfnt_off00013847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1