Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6dd7277e17ec226…

MALICIOUS

PDF

83.0 KB Created: 2021-03-30 17:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5450b9b322753641a95060e949a3a2b9 SHA-1: b7abea050aeeb9b5c786a789d474e8ef9a323831 SHA-256: c6dd7277e17ec226ba1ecfdb0f645a01aea58173ec133c2765243eba2bfe7532
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly/sqhk.co hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the nature of the link farm suggest an attempt to manipulate search engine results or lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=buff+pikachu+vrchat PDF link annotation
    • https://rujenamifib.weebly.com/uploads/1/3/4/6/134652207/4955105.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/XggOajg/bingo_blitz_apple.pdfIn PDF document text
    • http://zosuwalerikare.getenjoyment.net/constant_acceleration_problems.pdfIn PDF document text
    • https://jurogewogil.weebly.com/uploads/1/3/4/3/134318518/ce72afaad.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/M5jdbJe/us_national_parks_service_internships.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/historia_secreta_de_chile_de_jorge_baradit.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/dUejgem/zombie_monster_truck_game_unblocked.pdfIn PDF document text
    • https://luwujejajevobo.weebly.com/uploads/1/3/1/4/131407494/def8619bc5.pdfIn PDF document text
    • https://giminefimir.weebly.com/uploads/1/3/0/9/130969553/poruvelojanizeb.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/Q9jbie9/color_rope_2_game.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/gigfgeN/chermside_lego_store_pick_a_brick_wall.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/re_zero_light_novel_english_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/cDE6mge/gumballs_dungeons_g_d_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/hbjgMP1/airplane_clipart_black_and_white.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/jitexafemuzajagizotekomu.pdfIn PDF document text
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/jufowojogoniwex_medajotuziw.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/augmented_reality_in_education_and_training.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/ifghjgj/citra_3ds_emulator_pokemon_x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajovaputap.myartsonline.com/bodyboss_method_free.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/how_to_install_fastway_e2_hitch.pdfIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/siguwukejokeriwipubut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abda4e3-936c-47cf-8768-d1dfff4949fc/35388911735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e05605d-10cb-4881-ba4f-5c5df38db9a9/porter_cable_pancake_compressor_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9ab6a9-681e-48cf-9bab-a77865b56cc4/zopuxepovemipukizoxuvigo.pdfIn PDF document text
    • http://medexode.atwebpages.com/todos_los_nombres_biblicos_de_dios_y_su_significado.pdfIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/appsc_group_2_syllabus_telugu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 2916 bytes
SHA-256: de8cf6b5c67eff06d5cb75412cd2b6c23e689e422557f4802979379646040c91
font_01_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 5068 bytes
SHA-256: a8c8d48a7a41e73c82a18e78b23167e9ff9e206444cfe5453da1f44bff380122
font_02_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 11292 bytes
SHA-256: 7669bc2de5388b1f2b7ce2847fba5523aea16dd522f44309a255462b2aac0d47
font_03_sfnt_off000128a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A7 16160 bytes
SHA-256: 25a5e6c7c9cd73e1730f271d334b71b3c0ac6385951e3737251623a68d8eef5c

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