Malicious PDF — malware analysis report

Static analysis result for SHA-256 3270254d38b19a0f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-06 00:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9cf13c9bbbdd212a27b1109e134fd732 SHA-1: a29e53bffa23f86c5e4737d35aa018349c74ecb3 SHA-256: 3270254d38b19a0fb2d82a697f90ca71357885931459b91fa1028e150e4a2e0c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs are consistent with a link farm designed to redirect users to malicious content, likely exploiting a PDF vulnerability to achieve initial execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=hyundai+tucson+2020+brochure+pdf PDF link annotation
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072871f94eff---wiluda.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/137e9b2fbbfb2d2b4192b5bf543ea05d/varusuvikidowij.pdfIn PDF document text
    • https://maturana.cl/upload/file/joripikeb.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609415aa36b82---vexatudava.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/xegikavajo.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4972b5cc8d0130fb87b2b44f5ae5b04/75795252385.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/fiqvf9fpa5bl41903oh2umseae/rizetu.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/60905886337.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a892035e07a---75210438572.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/6el6dnas6nva9rp3smfgetm2p7/40179298887.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/labudoluvemosukiper.pdfIn PDF document text
    • https://mahae.hu/files/files/livepikezidukuzagoguline.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/4ce610f81299d3083a9d799666157d4b/68282030729.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/6407714486.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/64ef4aa359abb6463b25e6bff632c74f/3836635646.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/81eb1fea5e8901074d1c3adbf04e574d/472100107.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f968f5b4---lumuri.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa118d139a---dawefafe.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/56859355586.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/jiwowaget.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5c5001fdd71c796ad3cc5862bbf09f26/40963538522.pdfIn 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://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_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 18188 bytes
SHA-256: e4adc3962ad9b7e3361e491ab49ae8d8f686045baf9d530c13b6767569d4a93a
font_01_sfnt_off00010e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001262f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262F 11256 bytes
SHA-256: 25ef643a013371d01881d5075cee8a8b5357c1dfed7260b7ce92419a7badbb4e

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