Malicious PDF — malware analysis report

Static analysis result for SHA-256 5958b96aac6ee6e1…

MALICIOUS

PDF

86.2 KB Created: 2021-07-10 02:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67f4e9c4efd6c93a7ed2db3e07efbfcd SHA-1: 15080c0e8b0df19587e44915b8edc13e320b066b SHA-256: 5958b96aac6ee6e154fdcfb52e5e1343f14571a681788f108e6be3486ad49900
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. Additionally, it features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://argol-editions.fr/userfiles/file/diraxajeberur.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607927ee3b49b---tezafawunozemijidelazoj.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc9165cc59---60334754758.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609797f06d1a5---92441720083.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9945830223---xodedikedetowa.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d7a6a1e93---pewilefuwu.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/a247e7ed993fdeece9cd8761048cb2ec/desomanisabeji.pdf
    • http://3qlohas.com/CKEdit/upload/files/872069054.pdf
    • http://loveperfectionschool.com/upload/file/76792502250.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a597080519e---xowadikojomerorig.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ct3s362526hjgtmr0qagp0oj72/73909111650.pdf
    • https://termoformat.md/img/files/modelavuwo.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/97346140176.pdf
    • http://cobansut.com/userfiles/file/vuwawivikubumexetofire.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/4dq0oc548utu8pq7qp8pld9hlv/57041170885.pdf
    • http://dobre-jaja.com/Upload/file/74286435216.pdf
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/17598462467.pdf
    • http://desushibar.com/userfiles/file/wojemaveposemazupebamusem.pdf
    • http://acudrved.com/ckfinder/userfiles/files/76498032789.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed81303f7a---mimosupujesazo.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fbaec8081---76041975998.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=thick+cuticles+on+fingernails
    • http://janyska.home.pl/_mjanyska2013/fotki/file/62307646585.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_off0000ee66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 16792 bytes
font_01_sfnt_off00010678.bin
5fba437f08f7c4ff0df12eb473b71ad2ddda21d41ae7819895e41517e1c8f97e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 17244 bytes
font_02_sfnt_off00013304.bin
a39b783b944ca629a87a02bbad6062a7a55cf9d7374bfb113377eaf00b275d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13304 10772 bytes