Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1e16fdcf5239c1…

MALICIOUS

PDF

96.4 KB Created: 2021-03-10 03:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3771b4e2dd5ce5a4259d0ce8b9d23cd6 SHA-1: b34afe37d4d1f926316dec1193e5919b022c339f SHA-256: cd1e16fdcf5239c1f822322f0cfe0ac6745300e543e95802210d307f315bfbb5
186 Risk Score

Malware Insights

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

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 0.9964

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
  • 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://golowaki.ru/123?utm_term=galactic+civilizations+3+modding+guide PDF link annotation
    • https://cdn.sqhk.co/gufojakig/Ugijhii/xanozimadibifizasu.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/idoghbL/stickman_royale_toon._io_fps_gun_battles.pdfIn PDF document text
    • http://tiktokfrance.fun/characteristics_of_information_communication_technologyd8bf0.pdfIn PDF document text
    • http://agencymedia-ig.com/finuvamo07mz.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/ajeKOih/94583856701.pdfIn PDF document text
    • http://normal-id.com/how_to_replace_a_thermocouple_water_heater1hsza.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/gXsrTj1/dictionary_english_to_spanish_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/1ljhike/car_racing_games_free_online_without_downloading.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/018d54c1-efe7-4242-86c0-d3aa79ee0519/the_survival_medicine_handbook_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549f9160-1366-4818-9932-c665b8b70730/programa_de_estudios_2011_secundaria_ciencias_fsica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f0ecbb-c065-45a4-9fac-5d0e5870e1dd/wujuzezenewetup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be75d309-a72f-44a9-a422-a415b18e0c73/how_many_atoms_are_present_in_a_compound.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_077d2b9b78894276bcea3594d8f65145.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_29d025264f2d400a9b5a86c00e15c34b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ea7bb1-81e5-47fa-a812-12dd7fe06093/xizoler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b7ff72-4870-4b4d-bf20-f3aadb208012/52146812173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4dded5-67a7-4b0f-9300-57198d630ff3/domino_accident_theory_of_heinrich.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eac284c-b409-4f50-b9d7-0fef83188401/gebizagikitofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403c23ee-3895-42f3-9e1e-a0ceae9b5d64/2010_f150_king_ranch_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e16480a-3a2a-4190-a456-9861d961e7a7/why_is_my_furnace_not_producing_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0fb45f6-2f8c-4864-9ae4-3f5f983ff32a/63037011350.pdfIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_bf9a10427bbd4ab99efe63f828de44f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0bdfa53-e570-44c8-baec-03c4f6910a68/genie_3060l-07_program_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9803a0-63d0-433c-a0d1-bfb5a5972852/nefuraniveguxukeb.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_ff4ee0c63cad4a03acc71be95daf429c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b852ad2-3203-4def-a3fd-5b6afbcf6e9b/77753775743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3662aa73-1f1f-4f53-9285-4e2281c44cdc/57094914274.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_off00013ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD0 5468 bytes
SHA-256: 218cb2c78173d9eaa461ae7e7399800efa68aace1d23743eb4a547ae32a964f9
font_01_sfnt_off00014d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6D 11116 bytes
SHA-256: cbd9e9ad1f738a249b8c04741e8a6429622327866ea04f865dc8179eb3c731d8