Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f261ccf7552711…

MALICIOUS

PDF

69.5 KB Created: 2021-04-28 19:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 176443b3331d731023290b33bef9c999 SHA-1: 023a94ef5c126e3992fd720cfef4790b5ab1b9d9 SHA-256: 48f261ccf75527112b4a9cc5ea0cb59cc1ab7fcc06e9f394a9f3a781ba41c689
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c0e4e851---paguwazidalekapuwujigaf.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e836c0464---zetibolejunazaxaparajovez.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607570df33d81---46763301011.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769b7eff63---tuxazeniduv.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/81d254013046735605ba5d650721f028/siranefi.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/6f3b506ba103efc7fa18b31c33fcbd18/jusafosefebez.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/trlgbkgnai2cc2crv5bncftifc/2963498467.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab0fb3eea---rikisomaxaxaza.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/7ece9396e78aaf937edcb41536732b58/50762148499.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/8e35e12d1454217f1d7f7b0b72df3142/zaxeferasuvovusexebedivos.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e826bc707---21918928796.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079733eb63ea---bejagurufagexitawidab.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd4cf88f64---kiwazibegeban.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071cec94c85c---gapofubavopokolagevo.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/619132cd19b2287cb916d1eb601a1ccd/59365589346.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/467ed0df4dcc743944f056a8b2f39225/65898238770.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d751c5279c---lanekowovegoloxojoluzewaj.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607e484f3664a---rugomolisofezatavur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=get+your+guide+email+address
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d6.bin
4ddb81789da18eff9dafbc3c259f8586f4f09977ebf606b2c1d710a81e7fd20e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 5280 bytes
font_01_sfnt_off0000e4bb.bin
fbd251b4a8b4a6f82b01fd840131a6d84f5de1bdf93d6695fe94d992c7226c5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 10228 bytes