Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a0ed43d4ded78e…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 01:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e31d239bd4a22c143b807e7865125eb0 SHA-1: 55e6650f63f6dd8232e60a2faedaabdde97b5a34 SHA-256: d9a0ed43d4ded78e44cf8244ed361d5c6f2d110b20144d4f0ecc5d9152c00b8a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file was detected as malicious by ClamAV and 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 shell, a common technique for executing malicious commands. Several external URIs were extracted, including one pointing to a potentially disposable hosting domain, which are often used for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://ponafet.ru/123?utm_term=action+plan+sample+format PDF link annotation
    • http://takipleskazan.org/1538809366falzh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_602c15ae4e97e.pdfIn PDF document text
    • http://torchland.xyz/810354672456holx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5fd7461c5660b.pdfIn PDF document text
    • http://nizalanus.22web.org/qualified_audit_report_adverse_opinion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_601f344349886.pdfIn PDF document text
    • http://vulupexemuv.iblogger.org/davinci_kalani_4-in-1_convertible_crib_conversion_kit.pdfIn PDF document text
    • http://cosmicgig.com/731467724716cx8c.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/foraging_theory.pdfIn PDF document text
    • http://glasshookahcatering.com/autocad_command_bar_missinglwi61.pdfIn PDF document text
    • http://zogeditel.iblogger.org/10924166886.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/lista_de_verbos_conjugados_en_ingles_y_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijojigig.epizy.com/human_skeleton_bones_labeled.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/the_misfit_of_demon_king_academy_season_2_manga.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/jacoco_code_coverage_report_exclude.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/33230854951.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/kingdom_come_deliverance_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/38962870586.pdfIn PDF document text
    • http://tibamupebunod.atwebpages.com/kufexofokedesawobimekeku.pdfIn PDF document text
    • http://magivuxitafexox.rf.gd/alu_alu_packing.pdfIn PDF document text
    • http://baloxes.epizy.com/what_is_the_smallest_capital_city_in_canada.pdfIn PDF document text
    • http://letelexedat.epizy.com/bomabogudazedud.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/let_s_go_pikachu_shiny_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/grandfather_s_clock_sheet_music.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_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 5152 bytes
SHA-256: 62545bfaea6d61dbe4d15c6c8860b5d0a7be0aac02459e7c15f3d2c03f7fe4f0
font_01_sfnt_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 10968 bytes
SHA-256: 13af1ae15621405ce08c886986bcf09c704a0e44a5c1bfc412d96cc29fabb3d6

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