Malicious PDF — malware analysis report

Static analysis result for SHA-256 56650201654038da…

MALICIOUS

PDF

98.7 KB Created: 2021-09-03 03:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8d289598c6ec07bed18dd0553165f198 SHA-1: 4aaf4f68569b7a53c1ac5488fb1b2f65ed477a60 SHA-256: 56650201654038da1d4974ae66b29592dca266c877b0004fd4c02f1c9a4c91f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDFs that often embed JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://catamma.ru/uplcv?utm_term=swiss+railway+map+pdf PDF link annotation
    • http://color-gateway.com/userfiles/file/xevupifakapasex.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/ff7f6e81fd88daae96a2ca2b1d033e14/2043641163.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/gajav.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/64973853727.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/xalotuwiniwotagivi.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c21d584b1b---xojupapazudirujanud.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/f5987bcf88b02502d233c47530f1fa78/jitoxija.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5de2ba56240f535f82eacc6bc55e6ab8/pomajeni.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ojk09g715gsv7rbfcitq4pue65/81585793457.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/27955238629.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/kimabivimatolazox.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/iebqg5snqea3pe7jvg19mg8fgf/lurirezifufa.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160df5378d69e6---suxububefagurulagani.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ecc2ef545d434ebf4215ee0785dcb0a3/28246294942.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/58413417461.pdfIn PDF document text
    • http://mploa.com/clients/2/2c/2ccb326c3583e393996f575e36ee3974/File/mobedidilutapizidoxowi.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/ceb9e1bc6cb0a6201eaab3d3bb69e498/10428911110.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/bc8ae6d686be0f714c2b799e53c74859/megiwifovuz.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/50574601785.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af92ca8f6fc---49397584730.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/cc8b8f07fc97bc68f8cad12ee41de84a/webir.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7rdioahppcq1hcsg4c08ehgj37/ruganu.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daa3d21f62d---mumitikodatosupilodapo.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/pinupetiwosuwisipe.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/2cb33e87ad2e9eb3109fd9e930eb9bfd/jofonoxode.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_off00011885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11885 10480 bytes
SHA-256: b248bcc25c804da58e0638eaddba67b13a9c84b5a110ccd16477fb5fd387422d
font_01_sfnt_off00013053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14865 20164 bytes
SHA-256: 68f1cadfdba1b9985fe8c3705af9129563cd37a6f1ba03b10b1116f593a722b9

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