Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcef780ca08f37c…

MALICIOUS

PDF

91.4 KB Created: 2021-03-14 23:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 99cbabe840d6401a1f178d7372309b00 SHA-1: 99dfa1ebc3914ace5bb30bdba85d3afa9551017a SHA-256: 5dcef780ca08f37c810fdfd2dda179f8c7fe89e6186278474c71cc0ec7887482
166 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as malicious and by an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious code. While no scripts were directly extracted, the presence of numerous external URLs, some pointing to PDF files, suggests a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://leonvi.ru/wix?keyword=smog+check+obd+reference+guide PDF link annotation
    • http://heartcenteredequestrian.com/40829111900hxw30.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/Whdhjgg/54785494946.pdfIn PDF document text
    • https://cdn.sqhk.co/tijaxasazuwi/giibFVH/okc_thunder_logo_colors.pdfIn PDF document text
    • http://lishop.site/2007_dodge_charger_repair_manual_free8v0wr.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/phone_claim_affidavit_verizon.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/Vgfki7W/fruit_magic_master_match_3_puzzle.pdfIn PDF document text
    • http://stakingyfi.com/why_was_americas_next_top_model_cancelledd0sxd.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/jbjcy2d/sevetusosatoradaburelor.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/uejjbic/mipogujidawafotewomos.pdfIn PDF document text
    • http://sazinoz.mypressonline.com/1981006437.pdfIn PDF document text
    • https://cdn.sqhk.co/bepigulusibe/3Yqxbje/19922012978.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/Ric5NJW/free_movies_app_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/LA5iftS/fibibow.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/how_much_does_a_nutritionist_make_a_year_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/jikogifuxa/EiaijWt/rikolewixusov.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/g9HqVzS/london_rex_silver_games.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/hYgcgd9/download_game_my_city_pajama_party_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexawiturefu.epizy.com/bunny_rabbit_template.pdfIn PDF document text
    • http://kivajujudupogij.epizy.com/boyle_s_law_worksheet_answers_cavalcade_publishing.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/39879424404.pdfIn PDF document text
    • http://jutekezas.rf.gd/hoover_windtunnel_pro_hepa_filter.pdfIn PDF document text
    • http://roveramo.atwebpages.com/zopavonoxufalamovotomud.pdfIn PDF document text
    • http://zekezixurul.onlinewebshop.net/download_free_autobiography_books.pdfIn PDF document text
    • http://mojabumenir.epizy.com/chori_chori_chupke_chupke_full_song.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_off00012534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12534 5320 bytes
SHA-256: 88249ed8ddd95b868e2eee16d839ac02276296afb7f878d8810937a53e93d15f
font_01_sfnt_off0001372b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372B 12032 bytes
SHA-256: 8dc8fb0f2157487fd11bd5f4d64f84ea6837a2de3410533a4ba14d5154fc5fe1

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