Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76f994153d84752…

MALICIOUS

PDF

63.2 KB Created: 2021-04-23 01:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 85b44176e2c757ac4d27e126ed593cac SHA-1: b8912208996397d6101f1aa887096a6303b9886c SHA-256: c76f994153d847520aae61c6d3e798e38f7e28fff99543652ad0db5a4cfa78ea
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, and the presence of external URIs further supports this. The primary attack pattern involves redirecting users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://nipisod.ru/strik?utm_term=rel%25C3%25B3gio+casio+g-shock+rangeman+gpr-b1000-1jr PDF link annotation
    • http://toxipoxekej.medianewsonline.com/dilations_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482869/normal_603fc2e907308.pdfIn PDF document text
    • http://magnifioco.site/50785913403qeaoh.pdfIn PDF document text
    • http://dilofab.22web.org/4135562797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5fd8ed8d09294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_6041c65e4e1aa.pdfIn PDF document text
    • http://cheeronthemove.store/pileluwal3nsmt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_602c08f2ea0e1.pdfIn PDF document text
    • http://reduslimitalia.site/best_crossfit_workout_to_build_musclecg3u5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jorixoxogud.epizy.com/poulan_p3314_spark_plug_location.pdfIn PDF document text
    • http://vamavom.epizy.com/difference_between_essential_and_nonessential_amino_acids.pdfIn PDF document text
    • http://nexuvojof.epizy.com/recruiting_email_blast_templates.pdfIn PDF document text
    • http://xupapuxonoxun.rf.gd/52321321895.pdfIn PDF document text
    • http://tulazonakem.epizy.com/square_d_pressure_switch_9013fsg2z22.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/online_banking_services.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/breast_cancer_information.pdfIn PDF document text
    • http://vepilezora.epizy.com/arihant_encyclopedia_of_general_science_download.pdfIn PDF document text
    • http://vigigizumobake.rf.gd/pakoxizapop.pdfIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/tipos_de_funciones_en_programacion_c.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 5996 bytes
SHA-256: 5c0ffefb976508ff388621c6987af2c069178f6a15da81eb2858d2c17ede5855

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