Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fb1ff5a4a71567…

MALICIOUS

PDF

81.4 KB Created: 2021-09-05 07:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7fa275bc0c04a04fa65f02eb4aa41053 SHA-1: fc24e02bf36bbea0e8ee7bae45db94cd76f0d547 SHA-256: 22fb1ff5a4a71567f96a1fcc7a523c639fa4f31588bb36328fbd1bad283f3d39
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and numerous external links, many pointing to compromised websites. The heuristics indicate it functions as a link farm, likely directing users to phishing content or further malware. The presence of embedded JS and the nature of the URLs suggest an attempt to exploit users through deceptive links, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://cructi.ru/uplcv?utm_term=stanley+fatmax+jump+starter+manual PDF link annotation
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/lezobise.pdfIn PDF document text
    • https://yodobashi-church.com/26497687468.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95180a2fd8---pododage.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b42e69731---49378448570.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/37830047828.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd80c05cda---82055162332.pdfIn PDF document text
    • https://petikdaun.com/contents//files/61356346832.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/xezekimumo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2cd874f82---56208794190.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1247413d15---24665613764.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/480697b9c8f4d7487660af20345add70/werenowamivabizamuma.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/28358355190.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/megokexirorinazozereboki.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/12a92554ea3d0091eb0a72f876e5fd6d/tusedu.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/vaxejenaroxebel.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210902060228626.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/62inp9mebuvhpckudhp8ijjn31/betevunekejabeketagul.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/loganufitimisiz.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/baviguk.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1g6su073rier9lbl98aamoeo44/mopetejazedisuju.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160951fcd89dfa---65067397988.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/76300402314.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/zuzodo.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c098e822d3---zovagemorububunezunilosob.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/80021730801.pdfIn PDF document text
    • 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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 17380 bytes
SHA-256: 698566395874470e1067aceb2ea5f52286245e94c99a1992ea546a5afff206ba
font_02_sfnt_off00011e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E51 10828 bytes
SHA-256: 4efd38bb42a6d8934cd1045a63ae2e72ef34e0fc467a494c412cfa0e0a042aa6