Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f7dd902e2c92ba…

MALICIOUS

PDF

84.0 KB Created: 2021-09-04 15:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d9288f38df3475aa8f3d81fe18f4e640 SHA-1: 475caa2cf2fc0c43b9a93f0cac4b69b26f85dbf0 SHA-256: 59f7dd902e2c92ba9a41bc96dcb94f2199a32e7f01d1b09461a1bc44b61507a4
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL distribution suggest a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://magnettoptan.com/upload/ckfinder/files/vepixinitojupolazur.pdf In PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/92024248128.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611abaff9e43d---gozowazejifo.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/65913683937.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/95415786215.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a86a176a9b756cf9cacf98c253e94026/xevisuxuzubuvatiku.pdfIn PDF document text
    • http://darec.sk/files/files/jakuxutusazifetoravitar.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/66021496649.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d86695e3d7---92008485609.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/5cf433b1b21593388739c79e4ff57b7a/94963910451.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c38867407a313eb0bedb128df7ffc6dc/peligeribapawixiruvonow.pdfIn PDF document text
    • http://grupophi.es/uploads/files/58514628838.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5490bd626a---15362900606.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/vizevolexigalufi.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/ronufinutagedulalanega.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/88371954925.pdfIn PDF document text
    • http://wp-kancelaria.com/userfiles/file/91143778198.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6f538c4e377f2c6166e8f05826b8bc2a/32027036357.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16070448c77dd1---buritatosajole.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/xiwavuxijuzipugedovu.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/wuwasududiji.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/13706936366.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=literary+devices+examples+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_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 18436 bytes
SHA-256: c07ace1dd595e43b6d2752fa138da7040213429f61522679b5fecf04bc530d14
font_01_sfnt_off0001101b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101B 11092 bytes
SHA-256: d1a08f03c23c92c1492f0913738000289f8c7be00a3a60c776e366c9cb64547c
font_02_sfnt_off00012a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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