Malicious PDF — malware analysis report

Static analysis result for SHA-256 6130ebc761629777…

MALICIOUS

PDF

71.4 KB Created: 2021-02-25 13:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c8217feb312cc48838a991c55548b14c SHA-1: 9d1e3b1d5ffe0da236f11656eb0e517db69f6808 SHA-256: 6130ebc761629777f5d18133c65a0797f2e28820e9fa2e5365154c5767de03c3
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or exploitation, contributing to the overall phishing and potential payload delivery objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crophysi.ru/award?keyword=does+wing+chun+work+in+a+street+fight In PDF document text
    • http://bosemefawixuwov.mypressonline.com/duzazuvafupumika.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/fake_xbox_live_codes_that_work.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/kotumo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/endangered_species_list_2019.pdfIn PDF document text
    • http://kedomaxi.epizy.com/cisco_ccna_packet_tracer_ultimate_labs.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/all_souls_cemetery_long_beach_ca_staff.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/lotesedisifomoso.pdfIn PDF document text
    • http://vurasoda.rf.gd/nokia_android_one_update_policy.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/9292793378.pdfIn PDF document text
    • http://denakisewir.epizy.com/bed_wetting_sheets_king_size.pdfIn PDF document text
    • http://zutadefado.epizy.com/waxemakekopaveguvutotazur.pdfIn PDF document text
    • http://kababotatage.epizy.com/twilight_full_movie_in_hindi_dubbed_part_1_2008_download.pdfIn PDF document text
    • http://regujivabi.rf.gd/10277179801.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3D 5264 bytes
SHA-256: b9db98470c62870c7c131b9d9781e1703d82770af855a7ca61f53d663b0594e4
font_01_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 10000 bytes
SHA-256: bcb0bafe0be7e226a917617949f0eec34be7940496084e56e367a2eacc548883