Malicious PDF — malware analysis report

Static analysis result for SHA-256 d325bd0e1f754361…

MALICIOUS

PDF

74.0 KB Created: 2021-09-25 04:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2dbc9a2c70f5f4fc9db969825654b5a8 SHA-1: 0073d1a614dfdcb6424beb76ad7b64b2f9501959 SHA-256: d325bd0e1f754361da5909c67020b191b8d5564798fbc766be8bd5a1756cdcbf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. While no scripts were explicitly extracted, the presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document's primary function is to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://florissantdesign.nl/docs/Image/file/57025635058.pdf In PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6qhp090cooos5tvo7slh4rqr45/bozasujuzivotogusiw.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/66482513213.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/5961139842.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/15545606871.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210901232120_859867231.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/90458626560.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/11439688288.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/58274752153.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/pogimisetowuxopaxobapata.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/fuparozif.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/89853920725.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/kefurazilevobev.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/gitid.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/30263882330.pdfIn PDF document text
    • http://okna-kursk.ru/page_edit/_samples/userfiles/files/zimik.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/92525367591.pdfIn PDF document text
    • https://arerp.kr/data/file///kuzugutudoximizinunin.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/wibigiguje.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/fukotopijekodadipusotep.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/74867640033.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/mumobewemebomufexebebunow.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/motugezaxizudatoraxoxom.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/kukonadosiluvinavidokewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=650+case+dozerPDF 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_off0000bce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE9 17796 bytes
SHA-256: 8d61f651d69778029fd6fd5d5904377da2965d35b7260d1ce3a3cd981ede8e4d
font_01_sfnt_off0000eb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 10408 bytes
SHA-256: 41d8a0ed998147c7e7b7bacf2d9b87f0c7801abda617bce17dd58647313a183f
font_02_sfnt_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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