Malicious PDF — malware analysis report

Static analysis result for SHA-256 022fcb8991163391…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 20:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 32e4017ec9f98bfc65a2e4c3f4113b41 SHA-1: 81441a1258898b282241c0b69c140427f5018170 SHA-256: 022fcb8991163391b6cfd13ff12144e7a4ddd65f9d9d34c40decf091c680f573
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised CMS uploads and link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery by redirecting users to malicious sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garglob.ru/uplcv?utm_term=ross+and+wilson+anatomy+and+physiology+14th+edition+pdf PDF link annotation
    • https://szallas-karpatalja.net/upload/nalixugopotokexakowipope.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/kivulafijusikalabu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/9009b89f5611f348bbabec713917142a/jaroramuwamitogagi.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/lifokuwexulejovakaxekeli.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/7260469449.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/32975602731.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/12196238382.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/80563669864.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614405e77ff58---55232794486.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/wekuzuson.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403be90b434---piwemenorapuluvefulo.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c2a5a3f0---baganazimu.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/98315508881.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/a11b5c36035de787db99abbd6ee12a2d/94159931104.pdfIn PDF document text
    • http://panova-art.com/files/file/12935291291.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9d10e9d4a---41624763411.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/69190307608.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b11ec1c4a---pidetebapalaviresawaz.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/gibogasukufi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/fojosujazijukirefuzomikaf.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/lajijavegasiw.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/65866515495.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dg6c0phonk4u8cj2oqdohlo7f4/xejanusefudomesoluluzew.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/divuzeforojekesoligufu.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/venojamonelate.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD069 17276 bytes
SHA-256: 9086c41712b7115d063cc0a5ab4445bb6d450e7196656a852528df9dd892c584
font_01_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 11220 bytes
SHA-256: fd6e7abec3cd290e6e2d59a1a7666ff2f90f87c57e67c6e7211b90409a8ab407
font_02_sfnt_off000117a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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