Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8392887444b46a…

MALICIOUS

PDF

84.4 KB Created: 2021-07-02 11:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1d4ee55a25f9d168c93c34115305206 SHA-1: d02712a1539430da8cf376deec65cc9b53ae0237 SHA-256: 0d8392887444b46a6d2f55cb8a6b8c1d8be67db04b11e03252d3253e39afeabe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded URLs.

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://nomylo.ru/uplcv?utm_term=skinning+wow+shadowlands
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/gojefideramesogodaper.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3a9d825b837e00cb6570442c9f484599/97654079847.pdf
    • http://aotwresort.net/ckfinder/userfiles/files/58328009557.pdf
    • http://www.logomarcanet.com/userfiles/file/libawafuviwoxapa.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/f687661ba545e8ed438f52b0c41eb5de/wabozigupavebupulu.pdf
    • http://whatdwellswithin.com/file/62216604766.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1285d9b847---5470739291.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a96354bd0a---15181881506.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608551e4b776b---23344138611.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/da2b5bf74db0dadaa485afc0c48fe794/vorararugumarikovigiwubi.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/cn7sb2riqeadvleref31bdojca/1190181253.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40b02d106---70252296015.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2663679432---giwubexamunale.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/01jum2tvbggqpsbqq9ltqvofc6/49971153389.pdf
    • http://hydrem.ru/images/file/76246575794.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/ligunijeguvu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b97d2f14c---rofutojoluwupiwad.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a5322b8ab---viwemenewamarubufudegupir.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f38e6aa5cf7558033e29eff8809d3dc/zawagazipanokizilifo.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/phgj2qr7tbltrqlfl5t9cs2krv/kemijudidofitegabusef.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607813244286f---vogefonosajikubopegeko.pdf
    • https://contabil-fiscal.ro/mm/file/bunabezavopoximolow.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5ef3b4b9e---butodojitojotokuzo.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/ba82686864ee968403bb756404bcfee9/xogiso.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_off0000e976.bin
5a0639cb7fbb65049885bff6d708ea0780f2bbd3dca6d2e4aa5e61d54ed9d99f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE976 10452 bytes
font_01_sfnt_off000100e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 16792 bytes
font_02_sfnt_off000118f6.bin
6bd972ce32b590130002dddd8663751ffca8e289373515c717fc41e7be563657
pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 16828 bytes