Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade49176e053f3cf…

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 00:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d1143837998cff4b338a091954f96cc SHA-1: df738cef6fa41240563a05ed5a761e9f0cac3ea8 SHA-256: ade49176e053f3cf4c7fe4ed60a0ca95bf635dcfb67b968f3d295b45e6ecc9ad
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 and disposable hosting, suggesting a phishing or spamming campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://blesk-stroy.ru/userfiles/files/zomexagusenol.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/874322b2f031090761d99604162ba9df/34086085883.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/debq3vu4j3elk8ugkct7bgqtue/tutenasoxiwef.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/d7a7b12919a228fd766294f3ce5ac901/83795105425.pdf
    • https://led7.ru/file/46290958305.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/semagaduni.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf9fc7c216---rarotuxebepazop.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bb7cce16e---vimavezapelaj.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c89adb646fabdca29fd7fdb654c3c66/17496018511.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b230b2bf6---zevudotafivalonovegekuf.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aabe99e39---besasegexesanoruxexoj.pdf
    • http://ithaca1962.com/clients/41687/File/jisuvavabojazomigutujuzo.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a386f35a77d403b644659052dde80225/19774868128.pdf
    • http://citra.cl/userfiles/file/roxovunixopowidedidumujod.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-10/20210610083556556942.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/eb6f34ed237db506bca2f6dadf920fe3/ruduloxopajatosomeloga.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811d638d2f6---zijapopunesutuzamamabokas.pdf
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/jolerijem.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/2fb17f0496c1026376264db6c5634732/42232165171.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082987f6cd62---vikirafo.pdf
    • https://accuratesearch.com/userfiles/file/87176536797.pdf
    • http://artkulinaria.pl/sites/default/files/file/16255276618.pdf
    • https://eminencesolutions.in/resources/userfiles/file/15893370916.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=name+song+maker
    • 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_off0000f0c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 16792 bytes
font_01_sfnt_off000108df.bin
15cc5272d3ef952c1622af02e9ee40533f4d0d17e356fb055d2fe937815033d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 10284 bytes
font_02_sfnt_off00012000.bin
3043c6db97676f62da9545d3f658b39ba93ea2d506c504e27a2147bcd4d5fab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12000 17372 bytes