Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a163049f239327…

MALICIOUS

PDF

92.3 KB Created: 2021-07-17 12:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb795ce07580efc3b62db68e66dfcf01 SHA-1: 7f23f9bfcdc0f6d5a08dce9184c426c9a51478fc SHA-256: e6a163049f23932757013d00d708db081546ab7a8db0b17238bfebae7da7ef0d
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://royalgoodviewresort.com/Uploads/file/95528481314.pdf
    • http://goteneplast.se/files/images/file/13528655037.pdf
    • https://maydangson.com/vietkiendo/upload/file/15089919369.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb9077cb8---sopejolukaditin.pdf
    • https://abugfreemind.com/userfiles/file/surilerumi.pdf
    • https://gachbinhduong.com/upload/file/wuvelilajowoweluruba.pdf
    • https://serwisnawigacji.pl/userfiles/file/kikixiwibabukoserosoxak.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/2bf4c1e9e541dd6a07c04ee8ff39b3bb/lisaforekupowaxuz.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160e03986052ac---xokepufonutomujedikawovo.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/cfadbf9fd572df9166dcad82f04bcabb/gekofakoriwutiboxewukal.pdf
    • http://plnjl.com/userfiles/files/wuzatomaneteriv.pdf
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/vatigobugida.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/vf9jmba5oamiiagk9g96s9epcm/2496915920.pdf
    • http://indago-rovigo.it/userfiles/files/jovojidowuzujikaga.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/7500cabbeae108009e4c59a2852c9391/84063087056.pdf
    • http://capitaldanceacademy.com/userfiles/files/xusopapokijobi.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb98318381---26400748419.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e90c5db1---xitepuzi.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dad9e3c1979---57481855169.pdf
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/mijamixis.pdf
    • https://speculatio.in/ci/userfiles/files/32279092343.pdf
    • http://riskhedgetech.com/uploaded/file/514141681609f8b6210bbf.pdf
    • https://bagstyle.uz/images/file/nosaxiru.pdf
    • http://assytekservizi.com/userfiles/files/wimalaw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=questions+%26+answers+on+formal+languages+and+automata+theory+pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a7ee8105537a27916327bbd2379eb7db/95895821067.pdf
    • 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_off00010b52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B52 16792 bytes
font_01_sfnt_off00012364.bin
6b9b18d382d13d36affe333d78c9a45d32ce77db00d212757e0160c519655f50
pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 16504 bytes
font_02_sfnt_off00014e35.bin
bab0f7cff89e8ed04a29bcacad5b293305b5eff7c506c46db246e00560edc512
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E35 9944 bytes