Malicious PDF — malware analysis report

Static analysis result for SHA-256 432064980d7cf14f…

MALICIOUS

PDF

90.4 KB Created: 2021-08-11 21:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2fc2f7a9198d1c664594bc20c6ff90c SHA-1: 140106cc0226703ef2d48f1c08e3edf03b305589 SHA-256: 432064980d7cf14f28e20d8753b2da5f00eedb4b9d99fa81e033dd957273ae8e
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, many of which are hosted on compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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
  • 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://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d37aec9d47---pakomifijuja.pdf
    • https://gregor-biffiger.ch/userfiles/file/54447611203.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/rejukopiwuzanuvawabenad.pdf
    • http://albino-pitti.com/pub_img/file/74434622542.pdf
    • https://isabellepieman.com/userfiles/file/toxudosagesufekate.pdf
    • http://beijingxinzhi.com/userfiles/file/20210707230032_1051994115.pdf
    • http://antifftech.com/uploadfile/file///2021071400142922.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608037c7eea87---72686158711.pdf
    • http://fitviewer.biz/files/file/24476446213.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d9fc9be8---futexavos.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/675ff993ba9250e73f3c73016c5874c8/82649004121.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/u3hg7thcn80c5oiu9h1jfpur54/48360725825.pdf
    • http://castrolmintabolt.hu/images/upload/file/62141193952.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/e6d42f38c911b88e2239ed4446033c86/31830887848.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210629_79479701B0494F93.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607581f85769e---mixijoxe.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/3f94dddc31a4997c3331d134fc8398de/ruboro.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/618f4a92d5003cb6a1743ddf0340043f/61413013209.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/loo4t59u99tasr9l1epra90dn6/26672762831.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/lepoxalebevuwudedalunal.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ue79tnsd34jghrgq9a0cf8tv21/divugumisix.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/49108980410.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcee0ce5357---47709906327.pdf
    • https://humicdp.com/uploads/2021-06-30/images/files/xomanurodebodazadu.pdf
    • https://gachbinhduong.com/upload/file/roxavunexe.pdf
    • http://aelma.com/sites/default/userfiles/file/96007879895.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=is+my+zippo+worth+anything
    • 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_off0000f8ac.bin
ce637dd123c5bd05bf0f5c131d6a72cb09a58605ee9b5ca9e29469c943e97bab
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 18420 bytes
font_01_sfnt_off00012944.bin
1f1833a2b2b5ebee8291e71ce10a3ce9410a171ab6f0280ac19ba1199b3639ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x12944 10732 bytes
font_02_sfnt_off000141d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141D9 16792 bytes