Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fab5567f434457…

MALICIOUS

PDF

80.3 KB Created: 2021-03-29 02:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85bd01001953f6b83c65b367ba0ac949 SHA-1: c65e53f63d764f9cb8642ff0cbbfd8b60aa8bafe SHA-256: e0fab5567f4344577c02ceb50ffc067c5b432a4d70798376be4015eb6066ecf0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/award?keyword=huduma+number+form+pdf+download PDF link annotation
    • https://cdn.sqhk.co/dovawowo/YjZPmhb/wwe_champions_2020_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/megeveze/MdBQSjb/adding_and_subtracting_mixed_fractions_worksheets.pdfIn PDF document text
    • http://kirerazunesamip.22web.org/kabakidovatiwusedano.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/hbieJge/33290745169.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/govonafejanideg.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/vOtidib/tower_defense_simulator_roblox_wiki_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/hRhNkgj/barbershop_annual_income.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/non_allelic_gene_interaction.pdfIn PDF document text
    • http://premium-cinema.com/blood_bowl_2_codesz8cm6.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/wopazideletanezemu.pdfIn PDF document text
    • http://itslm.fun/microsoft_timeline_template_freewxq2f.pdfIn PDF document text
    • http://mstmail.space/all_world_flags_downloadnts9p.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://fetavuxoze.epizy.com/71727844813.pdfIn PDF document text
    • http://sokagozu.rf.gd/47747966809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c21104-be5d-4ab0-81c4-2788e88ab8e4/fomijojuvunoger.pdfIn PDF document text
    • http://kozifina.epizy.com/balanceamento_de_equaes_exerccios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2c8f8a-38ed-4a20-9e97-93867acc33f1/38756080142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671455ce-46f2-4bde-a262-d1b69a43216d/detivedunekavajolokageme.pdfIn PDF document text
    • http://kidojudal.epizy.com/event_web_templates_free.pdfIn PDF document text
    • http://pulilidason.epizy.com/37390107999.pdfIn PDF document text
    • http://rupufunolodul.rf.gd/starting_out_queen_s_gambit_declined.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0447a34-9fb7-47ba-927d-e6e6f9b24377/nabufarozosufenikekub.pdfIn PDF document text
    • http://bovinow.epizy.com/toyota_hiace_2019_spec_sheet.pdfIn PDF document text
    • http://dadokupokumudav.rf.gd/96907054853.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 4956 bytes
SHA-256: 36b30339021e9c555a4868128be51c8c1ec8fa020543a676bc9e65912f8fc840
font_01_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 11044 bytes
SHA-256: e0f29e5de2f6f8e1bb435de2e28dd9beb10529db170623f22b287199bd4a0441
font_02_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3