Malicious PDF — malware analysis report

Static analysis result for SHA-256 f515e564b22885d6…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 11:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47791114098f1937a4c6f9f652dcdcb9 SHA-1: d46e8e55826b8391b7578821a6f13d4121294dfb SHA-256: f515e564b22885d66818acec3201019a1b35d6172c56d74ccdc7ed345e3652aa
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the classification of this file as malicious, likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://skogsformedling.se/bilder_umeny/File/jebirafezava.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ff37fce525d6715fbae53aeaa0cded2a/wozawukabujetowesavununox.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a75b2da0469---93788586604.pdf
    • http://ipceurope.eu/assets/file/xeroj.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c082d80927a---36568975643.pdf
    • http://mtecommerce.it/public/news/file/busidividawo.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/me048tke4e116l488kjlud1i13/15300987303.pdf
    • http://primebrokeragetx.com/ckfinder/userfiles/files/65224082621.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/j7u139u1kjk3nos07t7hku6qk9/90892126174.pdf
    • https://zweefvlieg.net/userfiles/file/72299936625.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd2e43b8dc---mukujuluxam.pdf
    • http://sskj.pl/userfiles/file/demogigulokuwadupolur.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2o267ihpfqmb85sugoq94hi3ca/8781018054.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/53117905422.pdf
    • http://df-2.de/images/daten/file/modupudosaw.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa553ea9756---xidijafolamefojaxadupalu.pdf
    • https://gulceoyunlar.com/calisma2/files/uploads/makezezeda.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad48867a3fc---97219589717.pdf
    • http://safarekhoob.ir/basefile/safarekhoobir/files/kidoluwevotusizakunagi.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/a4vf1m3nh5kaeer8gf9st8j51q/gebipofozunezom.pdf
    • http://spamsmsgiare.com/media/ftp/file/1184086821.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c6788e03b---pudam.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a12dc7ae373---31090645740.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d6ec4dee6---mulinusizizanowi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=night+in+meaning
    • 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_off0000eb7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 16792 bytes
font_01_sfnt_off00010395.bin
9e7e87541cf85d86000c6993f0f83eb28dd1576b06a46d1887e02b101077aaad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 10096 bytes
font_02_sfnt_off000119d7.bin
ad2f146f2ad0a454d003fd50ebbe26daeafa6102521c65e9deb9abbe3d55ecc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D7 16844 bytes

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