Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e9b9eae1527429…

MALICIOUS

PDF

86.4 KB Created: 2021-09-17 15:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cd47ee2aefcfced37fa339a622726fc5 SHA-1: a6e60233a58f85808a5f1da6fe53af5f8bd0a6fb SHA-256: f0e9b9eae1527429345ef6be55660fbce73a5ec7955dda03b7956a4989723d1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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 https://drafthe.ru/uplcv?utm_term=vita+pro+apk+download PDF link annotation
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/msertr80ecvc24vmuugcfv98j7/46872131997.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/30224047722.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c843fc018b---xeruzupaf.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/lubari.pdfIn PDF document text
    • http://ty-int.com/files/files/38865862707.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/vozen.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/labizovujoxekaxo.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/585222141.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/27379563060.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/89807700815.pdfIn PDF document text
    • http://gibisch.biz/files/files/88152341500.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109170412543717.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16308676961372905890.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/03191508953.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/difesij.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/lebopugew.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/mosebokufuvofepi.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/30568418228.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109020901478577.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/39587822136.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/sasutidivala.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/gomej.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/94045973503.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143763a3b688---73123294886.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/widasebawofewotonuf.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 10232 bytes
SHA-256: 07aea848a75a409be84f372971ceb89d048a6e721ca117e1e46650a410e15de8
font_02_sfnt_off00011ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 18972 bytes
SHA-256: aba390dd534f86cbc73025dce81602f6b0315fa06820b75b03c62413bb8dff5b