Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc385e08fc9cab87…

MALICIOUS

PDF

85.3 KB Created: 2021-07-12 23:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: baea65a446a734f8251e4f517213cf50 SHA-1: 74c02136fb1c1d334568430148adad43808689f6 SHA-256: dc385e08fc9cab87aae89d434a83a22b050629844ad9b91774ce9c34949d27df
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a password-protected archive lure. It contains numerous links to PDFs hosted on compromised WordPress sites, suggesting an attempt to distribute further malicious content. The document body is unreadable, but the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/41098aa76076f9c63c54a59587d73a28/13603885322.pdf In PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c72c58d65---bufitivivumararenatudofa.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607030ad53bb5---74212580210.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869a435b811---dalor.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/23285541123.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/a8946f7fecae113ac541c244e84eb82e/28987811505.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16099b242c5f9a---nexuvuxirarawuxuzirolupa.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/67626561947.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/afea300b9ab050cbf173e1bb9825894f/pilifumagikinera.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/58122474406.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/bepudulorojuwefisab.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/zogidejuwunara.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/30228220554.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160752d737a581---xulovunenez.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/163490067.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/dawevipedeza.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608212bd93ffd---1452133634.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/61778237963.pdfIn PDF document text
    • http://fitviewer.biz/files/file/35422197138.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/be4084534fcaf60e279325b7e7b5ecba/xiditikuso.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d5e5ddda8dd3c3cfd7e0cadf7e2747d7/nadajarujemakonizola.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b918e096fa9---pubikuzip.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/47f1920a630c3d1ad2949afde30ac546/83819826569.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/dc7b418eab1f8c288acf337e5e48f6c7/10627856982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=basic+ict+skills+class+10+notesPDF 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

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_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 10440 bytes
SHA-256: 7752b2a94a32d4cf355cfd1646cc5ce675ff4ded16541a5188215cc036b24342
font_01_sfnt_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 17312 bytes
SHA-256: 2a8dc78a6f22c7c9a55ef354376e744780cd1838348a21e411205da306ed90ad
font_02_sfnt_off00012f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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