Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b312397706e12c…

MALICIOUS

PDF

70.4 KB Created: 2021-09-02 13:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22d67aa2f8801d912c5173301be62a57 SHA-1: 4363fc1f7f5c0ce46689c52555f6cc24a2a09065 SHA-256: d3b312397706e12c6e2c828643319d1c1176ac1926c0ace2d7588b24d051e5dd
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic firings indicate this PDF is part of a link farm strategy, likely designed to redirect users to malicious content or phishing pages. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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=zorro+principito+manualidades PDF link annotation
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdf2c0c075---korofalitirowafuvanureb.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/14206003676.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/sihkdo66e81epc2qel3e29ics5/bufomezavev.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/52799712961.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/wovudisev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161244eb828b18---5005777591.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dee296a1bd---xaguno.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/rifiluzazitutodes.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/08a3d0686af2de2c87efcd16f0c37af3/wesesaz.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/05e587db479135e5c2441a1124b066e4/mokovexexot.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/92397414283.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pqh95ghrr5k13d9d1388qoa1rj/xumovorolimofawogo.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77487ad30---lubedinixakexikixuvojiw.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca40bc6312f---43343997811.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/bowazosepemepadazikadilen.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/forofenosofananu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/12e26ff2de2734dbd3c7fb9309610acc/xezaxi.pdfIn PDF document text
    • https://www.lloydsunder30s.com/ckfinder/userfiles/files/92877252025.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dae1bf05ab---83676643442.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/78700883022.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/gorobuxiropanit.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/74342056570.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/12620023933.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC16 15696 bytes
SHA-256: 61f54a18a65bd59b41ed4136833ce060a00a2f2c86e97d32a8bab66c8c04bdb3
font_02_sfnt_off0000f3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 10736 bytes
SHA-256: 5568eefd0a82848cbc6ac9250009d109404b4cf4fc2527f8200311130bcf2cb3

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