Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb4446718bef777…

MALICIOUS

PDF

79.7 KB Created: 2021-06-11 03:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c86960f5ffb4fc6212ad20c5e30e26af SHA-1: cfc68afc3e411069a23b8f1f6869bded96ea7bef SHA-256: 0eb4446718bef777a6e0c9db05ab9f9ddaef893f30b678ad7f909dd450ffdf5e
166 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document employs a common social engineering tactic by suggesting it is a password-protected archive, likely to bypass security filters. It contains numerous embedded URLs, with one prominent link pointing to 'https://inwebjor.ru/pbw?utm_term=making+momos+at+home', which is likely the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://inwebjor.ru/pbw?utm_term=making+momos+at+home PDF link annotation
    • https://jemokufofek.weebly.com/uploads/1/3/4/3/134312150/motamajotujodefuges.pdfIn PDF document text
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/robawe.pdfIn PDF document text
    • https://xesejiru.weebly.com/uploads/1/3/4/7/134716288/likubawoguf_gekoto_dedigip_tabug.pdfIn PDF document text
    • https://wagelefukat.weebly.com/uploads/1/3/4/2/134265927/9018682.pdfIn PDF document text
    • https://wuzubetimu.weebly.com/uploads/1/3/4/2/134266391/wajanegazalam-donafav.pdfIn PDF document text
    • https://botironolimuvot.weebly.com/uploads/1/3/1/3/131380397/7175481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lomexalipele.pbworks.com/f/go_kart_racing_school_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9afa67-e37a-4ede-9b76-242b4409d536/35237844402.pdfIn PDF document text
    • http://sufizilofab.pbworks.com/f/tipinumavezud.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/what_kind_of_hydraulic_fluid_for_forklift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72da7aad-c807-4cdb-9c64-9036796d2683/zuduwizeguzifejat.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/how_to_find_my_saved_passwords_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f382eea-d75f-4776-9396-349d56804c4f/radio_thermostat_wifi_connection.pdfIn PDF document text
    • http://ladopupog.pbworks.com/w/file/fetch/144838170/best_wireless_in_ear_headphones_2019_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041088a9-0860-4464-b035-ff1f278e29c4/kubota_d1105_spare_parts_list.pdfIn PDF document text
    • http://lipovosufuk.pbworks.com/f/xigonuroxeravavejozumuzak.pdfIn PDF document text
    • http://varulemenel.pbworks.com/f/burger_king_menu_2_por_5.pdfIn PDF document text
    • http://lomubel.pbworks.com/f/creators_the_past_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f5d8e9-011b-44fc-b01f-4a653145c47d/8941553954.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/what_are_cpt_codes_in_healthcare.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/66877975145.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 4828 bytes
SHA-256: 1f1230b2ddff9687ebd039f70ce3d6f325899c8a48bc66a14e1e89290ca8cff4
font_01_sfnt_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off0000fcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 11308 bytes
SHA-256: 799921275b7d93a1b95c506d9ba8e64556765bda050caf4f87f7e713649b6c75
font_03_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2