Malicious PDF — malware analysis report

Static analysis result for SHA-256 430dd250e1e56f3d…

MALICIOUS

PDF

85.3 KB Created: 2021-06-30 05:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86607c6d4677e36f508227d47590feb8 SHA-1: 4c9459762d38ddcb001a47dee6f2e6531a08c4b0 SHA-256: 430dd250e1e56f3db7eda2dcae0c813e44b597f07c2773e2dddf1f55ec1361e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ccfe11b204853afe68690c765545de20/39675158573.pdf
    • http://blueyee.com/upload/file/201425059520.pdf
    • http://ahxxzx.com/userfiles/202106/file/26495463012.pdf
    • https://netpage.info/userfiles/file/towepijigewun.pdf
    • http://10glazsikeyrosa.ru/file/kesesemuzotab.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fd4c35b38---8997209902.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a346e05b8f665a1c440d1a8d8adab647/6142016732.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734da89103a---mezelawebazowu.pdf
    • http://ourdesign.hk/ckfinder/userfiles/files/folijuvatuvig.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/3001085988fad764094cb11df472cd6c/32145462886.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160720075c983f---wefokata.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae65883242c---powabizafuxazuki.pdf
    • http://ypperfect.com/ckfinder/userfiles/files/litavagamikepe.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925c28056e3.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f39f8ac0af28105c0bb1e891b9a5d0f6/51136571389.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/iq6vs7v1ph7dlt5cq6t3lvk4eu/vetivugikamapogogixemo.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dade17e70---73413485310.pdf
    • http://nuitsdartistes.eu/images/file/pufakewefotu.pdf
    • http://agiusfuneraldirectors.com/files/file/lexonizujidupunesutokum.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/fced7fc5e30a1a2e728a0d5ed853fd31/xoxupinewotiponesiridu.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd940f1cb7---1922378188.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a339a5c4866---35921707817.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/gtm01thvsacif5g4rn5a414nd0li4da1/46451574578.pdf
    • http://archerelectricsupply.com/userfiles/file/fulutenilonuzupofobibite.pdf
    • https://testbankstudy.com/product/financial-accounting-17th-edition-by-wil
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=financial+and+managerial+accounting+17th+edition+williams+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_off0000e82b.bin
55dcb9ef6656a3c75cd1dace169c9697b115701bb930501fcc7fa8c240dcebec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82B 17480 bytes
font_01_sfnt_off000114cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 16792 bytes
font_02_sfnt_off00012ce6.bin
c6b8834b899064bf7f38abb6a4ac1e0d6e44218df8ae5c4e4392d8981f36538d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE6 11332 bytes