Malicious PDF — malware analysis report

Static analysis result for SHA-256 31525775a0984ca4…

MALICIOUS

PDF

81.7 KB Created: 2021-07-21 00:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 34a3768b769cdcc065f10efef614779d SHA-1: 218afa78374b60eaa73c7a55433a7ea78c49ee0a SHA-256: 31525775a0984ca466b0c46724f79b0d010de273287dcdae0fb95eb26612a507
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, and one specifically uses a search term related to 'warzone cheats on ps4'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The heuristic 'SE_SECURITY_BYPASS' suggests the document may also instruct users to disable security software, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/df330903412058fb4545e6fe04ef8d3f/47209203680.pdf In PDF document text
    • http://momsystem.ru/public/file/jusopexixewexajo.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/14291339847.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/xezar.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/3479104536.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c946d8034---59738343265.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/33012067704.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/topuxirawovimokin.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/kokusodenanotenemem.pdfIn PDF document text
    • http://4bx.pl/public/file/xupigexonuxevivut.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/96696545108.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a48dd74ebde---65281363298.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b821463f848---23909166025.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/wufedurakevuxu.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2q3sb8id2jiklnkehnlki70fkn/xamadiziviposofiwup.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/5522150020.pdfIn PDF document text
    • https://noddy.nu/images/file/47437030818.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/48428292125.pdfIn PDF document text
    • http://salkim.com/userfiles/file/88285843473.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6dd10d3a---72141173635.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/291845f41e4fffedac8b9a955db4fb3d/niradimupuporipatevat.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/4j9c85jifu2pquk6681ptlvfsk/javezaperukidozofenopeka.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/99345800150.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/57519416653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=warzone+cheats+on+ps4PDF 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
    • 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_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 10464 bytes
SHA-256: e08e08b710d41c770b934df348d7df473a3961eccd77a48e7876d265bff3d783
font_02_sfnt_off00010d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D64 16980 bytes
SHA-256: 8fc15fa1c81029123b2e17c102d4273ee6d67783d8dd19baba7f9ca569f108db

Open this report in the interactive analyzer, or submit your own file for analysis.