Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c66eb0b0fd23bc6…

MALICIOUS

PDF

69.7 KB Created: 2021-10-02 18:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 63473f5cf9e24965bad7df9b1aaedcee SHA-1: ebc1dfe5a80d4b3c12e36a2e4d93d115eecb4ba9 SHA-256: 8c66eb0b0fd23bc60bcc2c4b5488927c48f3ba6dbc772eb3c97421e5175c29ad
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://kirsanov-maslo.ru/uploads/xufoxi.pdf In PDF document text
    • http://free-note.kr/files/fckeditor/file/1176690378614f64d57ce97.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/pikubaloxa.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/761727175.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139239ec6795---mewowisufi.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/38301372648.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b58e789165---60897671985.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/49271069995.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/nadukikamosifijuvuvuwesab.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/tizewobeze.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/regujafejajejusegawupunon.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/67984449092.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/tanenefob.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/30284608882.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jccgj3b7vq75llmv84fc3kus9n/gidebetefelomurezu.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/mimidifaverudoj.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/76333563089.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/paren.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/15731763775.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/60296280917.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/7845354610.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e51ac49468f17f1c1611cfb3bd81a983/93490137894.pdfIn PDF document text
    • http://surausa.com/uploads/files/35671196747.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/gaxawosevufinow.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/wumakolibudigarexizoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=black+snake+with+white+collarPDF 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_off0000afeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEB 10560 bytes
SHA-256: 9d7b6b9709d3edb7eb1881303b88385fb912531c090f24e968d8e3de5d214260
font_01_sfnt_off0000c80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 16164 bytes
SHA-256: 10a7ed33cff4fa50fba10ed01a0023c06f7aca534c35dd96e0fd319b37daa905

Open this report in the interactive analyzer, or submit your own file for analysis.