Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee087866bda591b…

MALICIOUS

PDF

66.6 KB Created: 2021-07-05 04:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a86f7659bc27f371c8d286d05af58a7b SHA-1: c5d7a59d74de327487f15bdccbd6cbc30356c389 SHA-256: 1ee087866bda591b788956d31ed35e049da8b7ec87d11fd6dab67df34113a0ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, pointing to numerous distinct hosts, many of which are compromised WordPress installations. These links likely serve as redirects to malicious content or phishing sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

Heuristics 5

  • 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
  • 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://toolsatool.com/userfiles/files/batijep.pdf In PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608525d940416---wefuviwazopurigewineta.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f507157ad9---tojiwopofovuxekob.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099e996a41f7---kitonuwodoguzuf.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e5e54a71a---kuxofufiselu.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088165f52661---ziwabafuxetibuguje.pdfIn PDF document text
    • http://fittbikese.hu/files/file/gomusikebilive.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/d5b9k3cn6piu4ijkjbp77rserd/zutapavajokuxenekobesikij.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/7bec6fe7ec860d3660299400659aea3d/murufizexokukeroxu.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/jumukabedat.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/wojutosifibepulokutu.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/duvisevefuxibebuv.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f08295c5d---24957794723.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/fuwovakezadewimefe.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/1383eaf159325273bf63015af6fbe36a/73339760530.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8cf5ce33---99149762532.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/0ee39bcebd7f462fa0c1caa716e7b4a0/rizoturidokexanifubobu.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160741a68a9255---tajajujus.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/21369440982.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/25883075463.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/8r86727h0l0cdqvt9rg3u3l2u4/kafuveko.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210523152231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=use+of+restraintsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 10168 bytes
SHA-256: 3f8de34244beec3b540cdd6da450b4dbf02cdcf74520808867c28f2c2388b619

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