Malicious PDF — malware analysis report

Static analysis result for SHA-256 c458d00d151faeac…

MALICIOUS

PDF

85.2 KB Created: 2021-09-03 04:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c4eee384338ba4e73235a2df3f9e684d SHA-1: 241116e1854ea21ec864832979ed44b804ad62cd SHA-256: c458d00d151faeac0ebca569ec7b2c655a05feb60dab3aaccce8b0fa34693975
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious campaign, likely involving a phishing lure or a drive-by download facilitated by these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d5f69f021---sutafova.pdf In PDF document text
    • https://fullgame.hu/uploads/files/85522414718.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e83beb975c---mitapaw.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/lonisegelerajopipiza.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/vulutidenavenozozevuteju.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/xugokoxekokixo.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/453193301b0fa32d2385ece385b4ebaa/javemikuvased.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/83260715053.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16103355f40245---84590512438.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eecae14ce---29888990140.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/76138239005.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/cd75d7a20236c1010c20a65200cdf682/36974907603.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/35512200571.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d251a68d---fejojepewupobu.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/74f4938498b2ca9fa51e70601a8eef30/56980876300.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wawuz.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/qo2f2ef5bqso3a1rim8d8r4qh3/3673778736.pdfIn PDF document text
    • http://cmtsport.com/pliki/82543011971.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/49345970009.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/7696a9926415ac9ccebad5989c649f32/30776383619.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611437a15eebb---70268664756.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/jijonat.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/54371509f7387a8b8d38f1921f8c5efa/repokevop.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/32415477838.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/a8dbf02092199ab1c57b575091799665/65239808128.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160805e38c9a80---vudafurivoxevigalerav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=absolute+and+relative+location+worksheets+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_off0000e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 16956 bytes
SHA-256: 7e0faa77cb31774f78c2c6f5bd42481484fc35a2bfa6aedce5a035faa2e4870a
font_02_sfnt_off00012c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C92 11184 bytes
SHA-256: a18b5f70cf482245d76b68482789226a4b99e5678b1539a30144aceeaf4c95ba

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