Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4ad486af4880e6…

MALICIOUS

PDF

68.1 KB Created: 2021-06-08 13:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd265a73be60c0d0aca7ce933a39beba SHA-1: c5ff7c0a714688b04ef54596f4bb90dd681275a2 SHA-256: ae4ad486af4880e6cd68744e67072aba032527b1340a9e170b56163a371c6cf1
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a high ML score and ClamAV detection as a phishing trojan. The embedded URLs, particularly the one disguised as a game mod download, suggest a social engineering lure to trick users into downloading further malware. The presence of compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

Heuristics 5

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=outwitt+granny+chapter+2+mod+menu+1.7+download
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160996b24d6ed7---3453719256.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/r84lum8f1jpmbjis8fe1m17355/31574856379.pdf
    • http://md-servicios.com/userfiles/file/58768001543.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/b2d795a05067f662ace977952e9abd08/namegumigolasuxove.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160847c42363d0---xuxujapelodurenakiw.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/hnkm6cjh8jgqgsbshpml00drnr/13228901360.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a539892d47e---tapasasevobufasexe.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31a2d954f2---34266754920.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/060ae47f4eaa9f7d747f37d0daa2d4a4/tifepurinukadaduvofexi.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9828574c89---fobolelilonimuzebafosu.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/dgvkh7ivfgpj7ojdm08ukokne3/jixofeve.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/5e4ebad2eede8e93d183c5e68495a947/gewuviviwivosumuxotosojaf.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/lquhvlouj0kb8akrpu2s1vtcir/pogalavisawugomadilumu.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/380c75ca55b58cc4e53f142d5c89a4aa/pisubijojomav.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be92e596e76---2927381287.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pqu27epcrquo9vfjqf156urd35/4837806203.pdf
    • http://apexibd.com/uploads/fck_uploads/file/xomelerugumerupujavawig.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8e1feafa8---xutabotibawizulilik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d363.bin
30b01d4115b88e357997e6bd2086b9113b279652ebd2a7fec86fc23760198b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD363 5824 bytes
font_01_sfnt_off0000e737.bin
512f6cb5ba334813f2f1de056493bbe1c207fe10b8efe979f4c494fc85a7374d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 10332 bytes

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