Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0ab41c9f9ba6b0…

MALICIOUS

PDF

70.5 KB Created: 2021-05-25 21:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48200df8607701762ba7a65f90e5e8c7 SHA-1: 5f5aa5e8b2feeec1408ebfcbd8cd51caf03895d2 SHA-256: 7b0ab41c9f9ba6b0dc2fef636a0f1e8b6a7a67fee4684a8df489eb02387c2581
156 Risk Score

Malware Insights

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

This PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting. The document body, though heavily obfuscated, suggests a lure related to a game mod download, likely intended to trick users into visiting these links. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f746042e64---50018671311.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/zadirafelimoruzofefixuwa.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fc8e7b8c6cf328af9fd9343a2923d51d/31797275832.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/3tt0o7h08u0nl9huv3dnmgsg30/wavezidod.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b876a28e4---13010638927.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba9d0ad25c---sowakixebudatojijapigalo.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9441a8c127---59549445808.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fa8e5230d---16837639627.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834528e9207---sagugerizexela.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefa9ad061---57928510091.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091417c1b66c---zogedebuwonibi.pdf
    • http://ankamet.com/userfiles/file/37086664115.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/1aml2kd445akdj5dmjl3gfkr13/nasatofexuborukazun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=nickelodeon+super+brawl+universe+apk+mod
    • 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_off0000d36f.bin
7a5f818ca53b9327687d7660791c71c94b350b239d8101ac8795638a0dab2aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5544 bytes
font_01_sfnt_off0000e64e.bin
7300de089621f57b0261f4570369dbbf69d39136da6eefefa36c3b50936830b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 11668 bytes

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