Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dbddb1adb2ca26…

MALICIOUS

PDF

77.9 KB Created: 2021-06-09 06:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b838a7ac1b512279a589cdf0190af085 SHA-1: 980c3499af02a3d4e9e7ef37dc381f78a199f865 SHA-256: 48dbddb1adb2ca26d8519351953140c9e1435dcfdc736a7b8e17e9fb3de92035
96 Risk Score

Malware Insights

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

This PDF document is identified as malicious by an ML classifier and contains numerous links to external resources, many hosted on compromised WordPress sites. The document appears to be a link farm designed to redirect users to potentially malicious content, possibly related to 'sqlmap kali linux tutorial pdf' as suggested by one of the URLs. The presence of multiple external URIs and the link farm structure indicate an attempt to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://crewmak.ru/uplcv?utm_term=sqlmap+kali+linux+tutorial+pdf PDF link annotation
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/2bfcbdc77aa3db31af9cecabf5b517cc/75585969334.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/98319940687.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/4k1a4et5o2u4j7m7u1ug53co69/78342479341.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083547af3972---kelirepawofenofoxor.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/55056fc103d1cbdc84f96605c09a16b9/48918916768.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4837d818c---48551387708.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/debc43cc2023506ef61bf0e8abd780c3/jeriririvepowuwebe.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/756886ef4fe4f6ce4a027e9a696cb4aa/ginawozinikufavusajipux.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/5b0uutcus9b7de19f7vph8qb8u/24493490614.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/buwaxevak.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/94861842166.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/0b141e707e21c0767afc90d3444b5e0d/52214788118.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/c096a90d16c14e308f42b8396a0be632/fajij.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/49483153115.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608840b9eb05e---puwoxanupelinoxetovopalix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42E 5136 bytes
SHA-256: 368786a012a72f1cbd0523d2e812a26bdc1366120a22dd0efc2fc361925be025
font_01_sfnt_off0000f580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF580 11504 bytes
SHA-256: 7b09c0cf3d5f684c62c15d376a42aa900a72f9f089d2dbb2eab13c3c31a07c93
font_02_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2