Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14ca46a536c68d6…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 09:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b45c794930f397c25c757511a299043b SHA-1: 2c5b609caf37a802fcdc57a9b796699e8332f766 SHA-256: a14ca46a536c68d6e7abf67b25095a70265e7b36cefbd9bd3b3b0374e82feeac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely attempting to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://huntic.ru/uplcv?utm_term=typhoid+symptoms+without+fever PDF link annotation
    • http://j-line.ca/fck_upload/file/43713905174.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/54798917016.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/fiwojumexuregogukazopawer.pdfIn PDF document text
    • http://alconburyreunion.com/clients/36523/File/gagapalazuxa.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160796f8b0da51---vavurivobuzetazadegiwatu.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/desexi.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/50439958381.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a2b2cd21e---2302340597.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210721044620408.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/kopomujutisibima.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/tujeka.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/35633855424.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/nopelawoxojokemane.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/2e9906da0763dfdf8254af74b3d96d23/gajebupinakewukez.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/noladodapewibib.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1246e3f95a---majusama.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ccfc77e18---zetegurapomugudu.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076351bd031c---76370071106.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aed1763c2---1356748536.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/uvmat2sa9742crak2sngkfahal/wipedatowepanemoneru.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/tokexod.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd7536b1d0---85699441768.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/958c834889c24dd915b0326e3a14c9e1/nojupejezipuwoverowesef.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_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 17408 bytes
SHA-256: 6bb0b5bc7aaa818c8719bc3bbae34cacf534dbc65228d8ae0a8bba716b5f8cc6
font_01_sfnt_off0001195a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195A 10780 bytes
SHA-256: d8e15a7fb997f7b585d9fd16912a3a9016544534bba81bba60779564a133742a
font_02_sfnt_off00013252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13252 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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