Malicious PDF — malware analysis report

Static analysis result for SHA-256 2802e4bb1dcf5391…

MALICIOUS

PDF

87.4 KB Created: 2021-08-22 01:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e66a98b28a3c278dcf19dc464c6f8833 SHA-1: e5084dce0f0ddbed6c06e438228636d6afaaa911 SHA-256: 2802e4bb1dcf53916e4f6ce9cedb7d7b4257b14f5c7a00033f1392f5d7146921
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs point towards exploitation or redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://razaviota.ir/basefile/razaviotair/files/33205443330.pdf In PDF document text
    • http://dambi.pl/userfiles/file/wamewumokixilezegu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/46094289291.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae8cc58b03---tabaf.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/89531164062.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/e0e751a8b069a30c548085f1436f16d5/31344025035.pdfIn PDF document text
    • http://kbchina.de/upload/64268564304.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3k47ls30tusl7u4l4kju15udvh/23931928161.pdfIn PDF document text
    • http://freeski.hu/freeski/file/17055210940.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc37ce484c7---lujubukafivuribajerudil.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/gokajuwivofujate.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/48549309577.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/46392191708.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/fb3145452b5e2ef8d9cbec12e5ff1e6d/98159300030.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/wofesakovadututoj.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210614151652_hzrvsn.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/98552898771.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/65539226095.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/67244964718.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/b7c886408fd5160fe1d8f8c59d2010e0/ludugasubitijop.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/mojakifutaku.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/xutazimebezaditafox.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/17184182156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=before+the+wedding+night+ed+wheat+pdfPDF 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_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 10704 bytes
SHA-256: 2cb2a1ec11a273c5b4d5da3acb6a98a64c351e38406be10c394faa64d3ca597d
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D8 16944 bytes
SHA-256: 493eeec5a11d0087466c75e7d0a1afa3a624b0e686faf3d600753c900cbae5ed

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