Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba32fb08cc07a84f…

MALICIOUS

PDF

90.3 KB Created: 2021-07-03 02:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b15d32bd50290538dde80b387fd70cd7 SHA-1: 05d4c4bc4209d10a4edccf16c550851aba61e068 SHA-256: ba32fb08cc07a84ffa5ccb0ed2657215aaeee8fa93d09dc6ca60e576517531e4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efae1e2251---jawepubuzufabijewugo.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/n7g0mfldufli68pjrmn1sneile/84926299421.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086efdfc286e---barazoxexovitegat.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076abfe75016---lugugewedelasulo.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7ed716866---56630585802.pdf
    • http://trustarshida.co/cache/fck_files/file/todopibejevatarega.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfa51bb688---18354870824.pdf
    • http://classiccar-jp.com/js/upload/files/73826767296.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/83236398889.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc749f06fc---duzotixukerovadozo.pdf
    • https://esperanzadeavila.com/fotos/file/8990097627.pdf
    • http://www.odnpoznan.pl/fotki/file/file/gadefadeseforelivedeti.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f12c236cee---polabex.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7627bd18f1921e0f4b3adffb4fb3e41a/1424895396.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07d5ada969---28403448180.pdf
    • http://greenbrier101.com/userimages/42889666619.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abf5959f08d---kubufigakig.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gehe8oj4saht0fv9rltch9gib1/bovimokenabivetaso.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6adfa966ffbf1689f26dc54e55ac7b64/83130937732.pdf
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/girapudelidujavopegexope.pdf
    • http://rialta.ie/userfiles/files/tewakixujotosezof.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608566073f030---tubofanedebogidojug.pdf
    • http://transsnabstroy.com/userfiles/file/75692645678.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/240ca1b4606cf9617f33bc6ec54435bc/nidigapebosoluzoxowuvib.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=kings+canyon+national+park+weather+forecast
    • 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_off0000ff4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 16792 bytes
font_01_sfnt_off00011763.bin
9dce8cc8597a80da49b3f17906e62aeefb974461fb05ee7fb2fc2c22a0ae9ed4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11763 11044 bytes
font_02_sfnt_off00013123.bin
55b47cf9bc119c3c7ea60b56e6971b48bda4ad65d984ac956b2d87486664778f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13123 16376 bytes