Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9ad234fc72ac13…

MALICIOUS

PDF

75.5 KB Created: 2021-06-12 14:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6c479e36eab874624e46bd433d9cef89 SHA-1: 097a3bd73f68017dc05eeb02bdc9ba95880642a3 SHA-256: 4e9ad234fc72ac1321dbc917e14c4adb2d728ef0cb4846d1a23e2f43598ea120
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'smidgel.ru', which is likely part of a phishing or scam campaign. The PDF structure and embedded link suggest an attempt to redirect users to a malicious site, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://smidgel.ru/pbw?utm_term=manga+toilet+bound+hanako+kun PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409239/normal_6007370137b75.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/5024476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_606cf43f63e74.pdfIn PDF document text
    • https://katutufoderosut.weebly.com/uploads/1/3/1/4/131437544/mujofamizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_60c0ba181400a.pdfIn PDF document text
    • https://milanesove.weebly.com/uploads/1/3/1/3/131383497/jegulivod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zeladejan.pbworks.com/f/malayalam_kambi_novel_free_download_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b350b99-d9fc-4500-bdc8-3346d70b1b85/huuuge_casino_cheat_codes_2020.pdfIn PDF document text
    • http://magesob.pbworks.com/f/59448610918.pdfIn PDF document text
    • http://gugatodoka.pbworks.com/f/euro_truck_simulator_2_cheat_codes_for_pc.pdfIn PDF document text
    • http://difusowafid.pbworks.com/w/file/fetch/144945324/admission_form_in_kendriya_vidyalaya.pdfIn PDF document text
    • http://liguduper.pbworks.com/w/file/fetch/144935142/twilight_6_saga_midnight_sun_release_date.pdfIn PDF document text
    • http://kepodaworo.pbworks.com/f/15696400434.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144419043/how_to_get_bank_statement_halifax.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144426012/sepesikonotakili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5959f00-2916-40f9-b999-3779467cc3c2/lesson_7_problem_solving_practice_constant_rate_of_change_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca09e014-74db-4a6a-88d9-f776ed58a3f6/why_should_you_want_to_be_a_midwife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74971d22-1195-48b6-8f2b-1c9102a444e4/46776966859.pdfIn PDF document text
    • http://veputuvus.pbworks.com/w/file/fetch/144760050/coloring_pages_printable_free.pdfIn PDF document text
    • http://sonubugu.pbworks.com/f/wozerefulip.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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5020 bytes
SHA-256: 2aaca0415c7fe126447f8b789be3ad6f69f6b3cdcb314a6c70852337091ac09a
font_01_sfnt_off0000fdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 10752 bytes
SHA-256: 11238e9ea834841b8f81fcd41f6b64e4d58c80c5beb157fac46e906e76b494ab

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