Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba384d1ee5a7e28…

MALICIOUS

PDF

76.8 KB Created: 2021-09-05 06:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5edece2054ac0cb86632bae7cf452e92 SHA-1: 6d109d1968070a3048820c2c2a079a394bc8b587 SHA-256: eba384d1ee5a7e2886964c273a6c39e27e9e184153bc63cb3ab51d28bcc5b6bc
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous links pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The PDF structure itself appears to be a link farm, leveraging disposable hosting and potentially compromised CMS uploads to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://simon-daulte.com/ckfinder/userfiles/files/kafazasiwatutovedobum.pdf In PDF document text
    • https://npkfertilizerproduction.com/d/files/68036992519.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/betawofe.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/gineruwaxo.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/65915161873.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf8b27b80---8106695358.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/52950069359.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/fibuboxolilugu.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/wasisafatu.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/54119733640.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610f804e9d69c---mimuwetu.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16079829810147---zawaxum.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/mubafes.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/6ff49418e35b6ca565966c0276b5be67/wogaw.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/taponede.pdfIn PDF document text
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/togokosug.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/ue9iajkq45oeum5b7k436suvh9/tanope.pdfIn PDF document text
    • http://195exim.com/datas/files/kanapujupobisonimiwosoket.pdfIn PDF document text
    • http://zae.me/datafiles/file/litesojofodigeresogalaro.pdfIn PDF document text
    • http://amdind.com/userfiles/file/17766278207.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/13090928669.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161035bdfae3c9---sisolipomasur.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/xoxasawofoj.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2dac4eadb---9116415939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=real+time+systems+liu+pdfPDF 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_off0000c776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC776 17500 bytes
SHA-256: b159f9300b54414364c39df8cbab2c65081e5eedd0c2cdfa943459767c184408
font_01_sfnt_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 10592 bytes
SHA-256: f2cb85a3efbc0c6ab8cbe8bc75b8ffd0a7300ed601b3a3c89b2891d516755ee3
font_02_sfnt_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1