Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63df65b38b117cc…

MALICIOUS

PDF

77.5 KB Created: 2021-05-01 00:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b0eddfb5599bd26f441258bd3e58964 SHA-1: 340f33f7ab3436b11fdfff9256b98b88c0cba76e SHA-256: d63df65b38b117cceb32a15406c83a6b110b65cb848727924008322786e77814
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to 'personnel policy' and 'wkhtmltopdf', indicating a potential lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://seumenha.ru/strik?utm_term=types+of+personnel+policy
    • http://xerujupuje.sportsontheweb.net/ct_ghp_ch_trong_file.pdf
    • http://nupesupo.mypressonline.com/payroll_process.pdf
    • http://tehnotop.store/zaxufimogetegooxpdw.pdf
    • http://heartcenteredequestrian.com/78062041196s5t8j.pdf
    • https://wobajaxeme.weebly.com/uploads/1/3/4/3/134350369/23f84f7e116e.pdf
    • http://asia.kiwi/71096014885h3n2n.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/fukez_ximesomuxizo_ponuferunesa_manazakube.pdf
    • https://retibome.weebly.com/uploads/1/3/4/6/134680472/675e4562f0ffb8e.pdf
    • http://ragexerate.22web.org/gixunuzelazofa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://niwaraz.epizy.com/lucent_ecology_and_environment.pdf
    • http://kofaxafogi.myartsonline.com/firirulopisis.pdf
    • http://koduwutuvage.onlinewebshop.net/recommendation_letter_for_phd_scholarship.pdf
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_2b20e2c8feda49a39e8a2e412905b7bb.pdf?index=true
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_c7ccacc6f56744a1be7c7fa672868db5.pdf?index=true
    • http://zagofij.onlinewebshop.net/business_model_canvas_en_francais.pdf
    • http://telifujovemevo.atwebpages.com/online_to_word_convertor_software.pdf
    • http://lavodusepigixu.rf.gd/pevomavub.pdf
    • http://seroroxunabolu.onlinewebshop.net/new_england_patriots_newspaper.pdf
    • 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_off0000f44a.bin
f106388007862975e9a4afec8f8e6e4135a2a79ec8df2315153ad089f33de4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 4848 bytes
font_01_sfnt_off000104ec.bin
429217c8d8bf0156bb19e230db4a67acc764d956c67d27c2739c38d45c7fd616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 10864 bytes

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