Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b6c44f220b41fb…

MALICIOUS

PDF

78.0 KB Created: 2021-09-01 01:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f82816c09800d0ec4d3882a708384c2 SHA-1: 5e1b0612bf3b0102436de72161e55cdc9d4e59a2 SHA-256: d7b6c44f220b41fb25bcbd6439f27ca3865d926e7c6a99fc18c1d1106b042396
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised CMS upload storage and disposable hosting, a common tactic for distributing malicious payloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a method used to evade gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medpressa.ru/files/file/41721350334.pdf In PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/62696053719.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97e1d70624---magimilin.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/37778686350.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3913c6ebc---sanen.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/nukevafadekofazepan.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/lepapotedofononolemisokex.pdfIn PDF document text
    • https://pcetravel.com/files/file/nirupumuf.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/jipijusapobarapisadojexa.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/gesawexibo.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2933003785---22596990479.pdfIn PDF document text
    • http://coclub-us.com/ckupload/files/ziwixapunanejunufu.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5fb6386b55040e1e5f2e8cf40a79f285/81675721100.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3hp7ke9ln85h9r3su99uscdjfq/89726431751.pdfIn PDF document text
    • http://serting.eu/userfiles/files/70470771545.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95ea25910e---46781772315.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607497450ea4f---24421043681.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/62451806941.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/a5e4cad9e9710789ca16d09f85d9e1c1/17496480753.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1566c2b7---59700917815.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/busir.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/kanavile.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8008085b89031c891bacc7296d89f65a/99267426138.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd9ab6fef6---narilovokipebagenozawiren.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=openssl+aes+examplePDF 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_off0000cc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC40 18032 bytes
SHA-256: dd58f58e37c4e91957c4b8339198c1fddcae4afbdbba65072168ad141c825e18
font_01_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EE 10128 bytes
SHA-256: 04e3cb40102a4b906553a4d505476499d049202a0f6f1f263b18b5beb092f1fb

Open this report in the interactive analyzer, or submit your own file for analysis.