Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ac5c3735c1ddb0…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 22:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2be08a37cc697e412cde0a12bb5b09c SHA-1: 8e6e7dcc674c7470519073740899dc13608f97a1 SHA-256: 96ac5c3735c1ddb074c570d425079592e62c7ac24a4c65b510515f226288fe73
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host phishing content or manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=alcohol+content+of+blue+moon+light+sky
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/71235892888.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/oiri8d0en3pugo1e3p8tmkaie5/sivivirunufumuwutubasiz.pdf
    • https://dienlanhbachkhoa.info/upload/files/40597963600.pdf
    • http://sacoorhealth.pt/site/upload/file/81664673322.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a936b140785---batoru.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607bba41266c5---23312352794.pdf
    • http://thuduchouse.vn/pics/file/6661716626.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0gs1k5klsrlgefgtcjtn0e8880/minubataxesijoraxo.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-19/20210519174945386820.pdf
    • http://stellar.ru/ckfinder/userfiles/files/zubinajebudab.pdf
    • http://gps-tw.com/CKEdit/upload/files/41549471420.pdf
    • http://rogo-rotterdam.nl/files/83272785423.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/6cggoib3qddepfst006v88uopi/gizuwovewokafoko.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609181fa064bb---wememizetene.pdf
    • https://n-zvuk.ru/upload/file/85013801801.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/229a33fbfbb3fe8d49e35f94008907bf/jafoj.pdf
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/lowotazav.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7b9104577198f267b309ab4ebe2ac1f0/28679981844.pdf
    • http://refpecsbelvaros.hu/kepek/files/seturutilanoxibadabumo.pdf
    • http://school19-zav.ru/userfiles/file/28364212403.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c323ec46752---56108936663.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2db6f01b8---bawowinezaba.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc1fdcdef5---80933014395.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_off0000ec39.bin
718ef97fb6a957980960399104c9199a4b044b5a63539cea8fdd1e33fb5b6b73
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 17656 bytes
font_01_sfnt_off00011a1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1C 16792 bytes
font_02_sfnt_off00013233.bin
15008fd20b3162a7963f533dc486a47f365522caaad6ed8dd2a98ed8dccb8397
pdf-font-stream PDF embedded font (sfnt) at offset 0x13233 10948 bytes