Malicious PDF — malware analysis report

Static analysis result for SHA-256 27609c192030bbbe…

MALICIOUS

PDF

109.1 KB Created: 2021-09-06 05:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec11c4bd7978ae87f7715583c2a26886 SHA-1: 5d612a0fa7db1609070a4133716f158a76e2ea94 SHA-256: 27609c192030bbbe42e7aa9cb9585603002db935bbe3e73c1ea9e2aea8aabf94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URL analysis suggest the primary function is to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/eo8g448vjldqv7i8u755cuk28p/fodolobaki.pdf In PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610cff13b590e---11497415548.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/jajado.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109e0c1a2bdd---neloxidizifakaginaxubasen.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/162812502953.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/19567132606.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f92ba29516e---temipukamesot.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/38432037622.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/47477083942.pdfIn PDF document text
    • http://dzbnf.com/upload/file///pimusevirekozifadu.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/siregezuvekuwis.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/65679196737.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/mubikor.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/14276199762.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606db24e8e3df---josawolawodedekif.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cae6bd880---luduxiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ley+de+iva+comentada+2018+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_off00014291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14291 11108 bytes
SHA-256: 59edae7927b872bc4c687682ffd6d9ea642964f3dd21a7ee1a8754157a2727de
font_01_sfnt_off00015c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C91 19948 bytes
SHA-256: 0d5d4615f257722a827af73e7b46ffbf5e8b157f574c84d1bfdabf4a351b746a
font_02_sfnt_off00018f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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