Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fbefa0c1207c5a…

MALICIOUS

PDF

89.5 KB Created: 2021-08-11 22:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 53b33aa5959047763833fe9a99461c3d SHA-1: 8f469b9cb1111a4f6bcf18c20877e20de64c5c23 SHA-256: 64fbefa0c1207c5a61385c73cb4c96141e2e218aa231bd378fa88d8fbe87babc
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://chcial.ru/uplcv?utm_term=descargar+pokemon+x+para+pc+citra+32+bits PDF link annotation
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jolivesuwunipolula.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/23634685672.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/97257792772.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b171e8b6931---petikaxalibipumukof.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/41013744335.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/2693532583.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/tr256v163n4rebfrpa4k3cnvae/22473139324.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3704044e3---xerin.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/4a03c73be39e4080d2cb4f3307f96dd6/99286802968.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/63771270026.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/7795869663.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/xufilu.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/27785c33872e816c4337f3fbe661ae29/60822396442.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fad992ca4---lupobiwoxeta.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b44a4545a---88736275159.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/tolokemosidakidares.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/madejox.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4d798bf47---gujabusida.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/pupukuwubuvomida.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/58867400394.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ngov3vum5avi7kj4jkncgt8cv0/24451679170.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210808_092151.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/58572c111eed454230d68ce64f553e3d/wowelosizazemikuvakad.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/baritazume.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_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 18604 bytes
SHA-256: 0a8ae384728081bf87cfb1414cec142fa2404d331134f73e5e4d9e19e89d7b27
font_01_sfnt_off000122db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DB 11300 bytes
SHA-256: a8eba9dd78fca4ddbab1e5c92842e5e774fa5ebf9e3ba83916a105581549a7fd
font_02_sfnt_off00013d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1