Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c704eb7ad20dc5…

MALICIOUS

PDF

98.1 KB Created: 2021-09-04 12:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e8a481b042e6615a1af7490cf372c1c9 SHA-1: c5abcc871110fd77116d6edbf479d70ac4d8d019 SHA-256: e4c704eb7ad20dc57ef81e145939b93fb325f20c2da1408aafbcd2d770cb8cd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/f2af7f9399aa0f835b8a83f1afd3b6bf/pizamenediritivoxarilix.pdf In PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b7819e91e435936a1b8e136b473f73bc/8941190706.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xakovuwusojuvazuwolet.pdfIn PDF document text
    • http://shosholoza.de/file/detomegazopozukozuko.pdfIn PDF document text
    • http://fotossc.pl/_files/file/pomavoxibi.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900c61a5371---68048813944.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/96332673849.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/wejijitutexuwobinime.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/76b0733540042b80fde68586a83fc7a7/zareloralivuzijojukibog.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/32053069196.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/vabekasexepiro.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/51721479142.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/lepazefojusopumoju.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8dd2660f3de53dd159d8cb67017b6918/dulanemu.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/mifewo.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073504a420f9---41044604120.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3c9aae19---12761733474.pdfIn PDF document text
    • https://ivaco.it/file/lotesogedugapogosagidiza.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/94372186128.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/telalusi.pdfIn PDF document text
    • http://belv.ru/userfiles/file/25232196809.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/59593151025.pdfIn PDF document text
    • http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/raserufepijox.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0339a0f2---putexamav.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/dexuworijig.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160be0a48acdc2---70414630441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=english+comprehension+for+class+4+pdfPDF 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_off0001165c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 19908 bytes
SHA-256: 4ad258abf2fc82c7d2c536b883802f5853e9edbd4f8ede8c1875a67690d54f53
font_01_sfnt_off0001491b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491B 11028 bytes
SHA-256: 16333c1157e1bffbccb970db215cb4e38bc747d722e2e67e265cf311c7231449
font_02_sfnt_off00016257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16257 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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