Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5aec10a6814147…

MALICIOUS

PDF

73.6 KB Created: 2021-03-16 00:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85e59222f2c73db6bb6cd33c16f1605 SHA-1: e00dcac39af40d6b5282d2e07896f655ae747c36 SHA-256: ee5aec10a6814147c4dae47cdd75f2a922e59141f565238916e495d9cf1ccff3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one pointing to a suspicious domain associated with link farming and potentially phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to legal or official documents, which is a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=dichiarazione+sostitutiva+atto+di+notoriet%25C3%25A0+pdf+compilabile
    • https://cdn.sqhk.co/mewoveri/hfhghco/ninjas_vs_zombies_typing_game.pdf
    • https://cdn.sqhk.co/tavedikovo/t5ihibt/zuxef.pdf
    • http://tiwimifozukimu.medianewsonline.com/xufemavoduxor.pdf
    • http://jawazapefaxuzit.mywebcommunity.org/funny_icebreaker_questions_for_work.pdf
    • https://cdn.sqhk.co/xopigotax/iejehh2/98274060463.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_b40fda1db887445498b505560ca02d3d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c7728689-61f2-44b9-856b-91312d7ed2a8/listen_to_nicholas_sparks_books_online.pdf
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_a932e612f84a4a439897136417b16aa0.pdf?index=true
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_231533222040482da6a603993d7a8ca6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/739521ac-2027-44c5-b1d6-95cc1cbe850f/new_testament_definition_ap_world_history.pdf
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_0f09d5ab4cc44c74946d656b1ad446bd.pdf?index=true
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_05ac08c9781f4524aad5da636fa23783.pdf?index=true
    • https://s3.amazonaws.com/gotijejaj/16760930466.pdf
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_914196a094d04a08a867dd4cfa04320b.pdf?index=true
    • https://s3.amazonaws.com/fadedosi/ophthalmology_clinical_examination.pdf
    • https://s3.amazonaws.com/faxaxos/lifetu.pdf
    • https://uploads.strikinglycdn.com/files/93176af5-a080-47fc-bbad-2de576c1ef6a/soundpeats_bluetooth_earphones_review.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_c322575642fd4102925571ae3c894371.pdf?index=true
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_4c23a5d2cdd6419486f03e6a3f533f86.pdf?index=true
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_90cb1c11d173476f94f3fabcff28d832.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b58f01e7-ac8c-4915-91c4-365a3a50fcf8/how_to_calculate_gold_loan_interest_in_indian_bank.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de76.bin
f58230a17aff0f5943ea8564d8c520745c95afd5b06fa1f6b8e4e8ecefbc2961		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5880 bytes
font_01_sfnt_off0000f1cc.bin
eebb1837c3c5d2d6838d0f3ea822485990817ee1d14f9037f2884c591366e74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 11120 bytes

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