Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07618f27c973cf6…

MALICIOUS

PDF

121.6 KB Created: 2021-07-02 01:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c9550e81bcb28d126076967a387cbc07 SHA-1: 69dfc85ea7460ca08a330b7a63bd701129846926 SHA-256: e07618f27c973cf6208943e0881c8158ea331bf724c06344ad58fcdee83d424b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy on disposable hosting, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://klasykarozrywki.pl/public/images/fck/file/kutokavelon.pdf In PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2a42d7189b7cb0a87aed3d50ac630f0b/75469934576.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/0ad1760f2e50a59d56db9ff549d0719f/xizutixikoxumopolugoz.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/dlkvbnqq0l4hcck1dv52tup5g7/wuxiralox.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/kblt5fgrjnee0qu5l67qff2s62/pavozalizexamomop.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/trnbu8i5ev9m1bhntp1bap6k0m/mapipiwofulugavorimo.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/97234778139.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/sidopuwejiduvupuwapokusi.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/96196356264.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/33863951666.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/oppsmruuuicnauv7nj1ocf9ii0/sokimejezivorulokiwejala.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b274e253c8b---70193341059.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/71f4d24770d756f5fb66f080e9dd1016/26419855947.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/782b6478e28f10bd00d32aee790372d8/fogoruzepupuwutudotafuw.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/galolikigovuloko.pdfIn PDF document text
    • http://teplospectr.ru/images/files/perolumiwobawoto.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081093d98fef---11855308066.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1c952794caa7996f30e98d7ea1fb348a/xupubomamosusanu.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/2f4f81051fbb1daf4d6731f055901826/57627504401.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/wipes.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d891838243---binolof.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/35905951587.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/pinukemilidatejijebow.pdfIn PDF document text
    • https://webmenuplus.com/images/file/82610436608.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a5d0b895---xatem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+main+causes+of+desertificationPDF link annotation
    • 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_off00017e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19667 10756 bytes
SHA-256: 025db92eb3e9b6bcba4a5769c9587ee27c7bb95d48d822b27776789fd9f9e23a
font_02_sfnt_off0001aef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEF4 16236 bytes
SHA-256: b99f82a57e9c48d482f7e1dc39953f13ea2c8ce3a3c7df99b6852b297f83ca5d