Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fa2f64855924cf…

MALICIOUS

PDF

80.9 KB Created: 2021-09-06 14:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 05b2cc5eef59ba320af432a0897e2b50 SHA-1: a7c51bf094b9a36da06c0381e628a49379dc5e0e SHA-256: 60fa2f64855924cfae27a26afae44ec189b0d81968895072797a1d2a925edab0
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal that the PDF contains a link farm pointing to compromised or disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a 'download button' lure reinforces the phishing or scam nature of the document. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://microcement.ua/userfiles/file/82675633621.pdf In PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f33c3bddb7---nowupemid.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/beximunovu.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/53949527229.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/vipizezegi.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/94738678926.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/67149595547.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dcd6db966---jatejebagop.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/81814336638.pdfIn PDF document text
    • http://castel.lu/userfiles/files/54446015230.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/gofazinevulevikovodikaluf.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/wilexog.pdfIn PDF document text
    • http://markone-tools.com/upload/files/55315785863.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/buwosowevivadaluk.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdff5be0fd---zaguzotunesixosanipawebuz.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/0pg0u691098fopp6gg0l5qfmcb/mibago.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/vimiripojam.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b56d63bfdd---nekunewiroz.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b69bd4e53---82415379478.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ca3c5a86c---wojiwanosuzo.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/37370ec035824b2918535522a66a907d/64605596033.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5a69dff36---zigokovura.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607000682c72f---57419275812.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97567282796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=solving+area+of+sector+worksheetPDF 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_off0000d4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D9 18120 bytes
SHA-256: f4199e0d5de4279e089a061f1eb2c82ff9c474596eb3e793b94f5d8a1a82ca65
font_01_sfnt_off00010416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 10932 bytes
SHA-256: e1019ead49698b17e4ae8c6212348b5cce71f6b1c981d528680f20d7534452e0
font_02_sfnt_off00011d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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