Malicious PDF — malware analysis report

Static analysis result for SHA-256 9538dcbe76f1b696…

MALICIOUS

PDF

73.0 KB Created: 2021-02-17 04:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5f6915df24a81bf02df105a27167e9fe SHA-1: 9a49dad62edd502275dc39fd7a7cfe4c721952f6 SHA-256: 9538dcbe76f1b6962dc53bc6604c28486f0ca6b48b4e3a15b5230fbb645cc0d4
186 Risk Score

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=whirlpool+duet+9200+dryer+service+manual PDF link annotation
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/606cafd6d1c3.pdfIn PDF document text
    • https://vufuredupe.weebly.com/uploads/1/3/0/7/130776381/4692e788e.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/kupozavozo.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/cd6670c4b20cf8.pdfIn PDF document text
    • https://zewakifu.weebly.com/uploads/1/3/0/7/130740590/9102171.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/mgdiaDd/soop._io_parent_and_student_app.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/aicgzjc/spider_solitaire_free_games_no_download.pdfIn PDF document text
    • https://wowumufugijakig.weebly.com/uploads/1/3/0/9/130969685/sulezim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovuxeke.epizy.com/dokamepekudiwutizitefeb.pdfIn PDF document text
    • http://bevamixebigal.epizy.com/fluke_test_report.pdfIn PDF document text
    • http://gelidug.epizy.com/94068143725.pdfIn PDF document text
    • http://nataxos.epizy.com/wifi_authentication_problem_in_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/professional_compensation_plan_template_gsa.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/56531360726.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/medical_report_example_uk.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_off0000de12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 5920 bytes
SHA-256: e24108fc0382b505e064a13c111b113eb8aba84496d4032f7cd4d4e721fc4467
font_01_sfnt_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 10960 bytes
SHA-256: f5520872a0f5efa9c1b3cc515acc90929945245643d46d40d2f53f91a5cfed30