Malicious PDF — malware analysis report

Static analysis result for SHA-256 0049fe3c64d068cc…

MALICIOUS

PDF

99.0 KB Created: 2021-07-19 02:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 866e34eac17252c429fd7ab6e6135d53 SHA-1: 7e6f63261dce5db58b2dc3724b2bbb9b043e9bc8 SHA-256: 0049fe3c64d068cc9fd6070f24b22453732ea82008c484bbb29afaaae9fab892
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. These links likely serve as a lure for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anhbanglaw.com/userfiles/file/nuxemiwezapiniguladi.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/dc91ce19783342367d42855840bcd267/fidufuzaxus.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/270c90e6bd912da1d784559291a97495/xizuxisera.pdf
    • http://francisfamilyreunion.net/clients/870293/File/47794934719.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3ec9f3cc9be4d8602c99cc313f475133/49654678232.pdf
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/11958485559.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4228385a07---13464345457.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/6g0slo374e2nlp1tsdkkfqah8s/19747416389.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/be0118bbdc0b070457eb820775ca4f43/65961962516.pdf
    • https://alshaabcoop.com/userfiles/file/94365662330.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6f8e7705---pevitusigu.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04fc1eea11---jusimotewisarutodixukeba.pdf
    • http://phannhan.vn/files/usersfiles/files/depofaluwopodezage.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e8d4df567682b874ec96bce84d8a4aad/72045865016.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a784c66c146---49272405060.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/bidugejowamedifaxewojev.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6d58a6f7e---47295064815.pdf
    • http://frangarcia.eu/upload/file/39434714951.pdf
    • https://altonika.pro/files/fck/file/63829069273.pdf
    • http://finalstage.biz/js/upload/files/92202436186.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cedadc86d---39690102651.pdf
    • https://francoisdaulte.com/ckfinder/userfiles/files/zutaxituvapirededoretili.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/8882ef565729b422a5c21e4a8073097b/jujedasuwuzomonu.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608104b29093f---watalafozanezafon.pdf
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/49500063415.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=words+to+describe+someone+nice
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fb5.bin
921bf93e6d0ea3ebdb11962f53362a7e62c59415c034033dfa5b36133882247f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB5 18216 bytes
font_01_sfnt_off00014f1c.bin
aef19e1842051808fbe76f48befa08fa4b7e44da90a4014f2090467e004d5b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1C 10456 bytes
font_02_sfnt_off000166d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x166D5 16792 bytes