Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e449190c1602fd…

MALICIOUS

PDF

99.6 KB Created: 2021-04-01 03:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fedd11edeb8c382119a58c12bf6a4330 SHA-1: 1fbcd53819233037815ba105e42614e3390b06e2 SHA-256: c9e449190c1602fd53f2ccb2f08c4b73a0bce903d8fd9d8b863d803f80b22d1d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing sites or distribute further malware. No scripts were extracted, and the document body was heavily obfuscated, limiting direct analysis of its payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://fokemale.ru/award?keyword=original+bible+in+urdu+pdf PDF link annotation
    • http://comforfemj.fun/pijetuvokuvokasatoragdovi.pdfIn PDF document text
    • http://ighelpcenter.xyz/lukovasolkcja4.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/ggjcGjg/island_of_adventure_universal_studios_hours.pdfIn PDF document text
    • http://orehi-siberian-force.online/mifovixumotemunojozeneo5b3j.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/6dhhiiF/vadilemiw.pdfIn PDF document text
    • http://niwifara.22web.org/historia_do_brasil_livro_didatico.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/iihbXOG/8812513872.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_863e243fcb984be2a6f0b7ae8687a236.pdf?index=trueIn PDF document text
    • http://pepuzugalijiveb.rf.gd/shark_navigator_vacuum_parts_hose.pdfIn PDF document text
    • http://tibarokavuvuri.epizy.com/anti_deep_freeze_v8.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_5c4e61fbcb6f4109a9b338662eeae8be.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_788f2b7cb44a48358e3b88f54c4b3558.pdf?index=trueIn PDF document text
    • http://pejinubonuxus.epizy.com/sofezibafizifugimadopeli.pdfIn PDF document text
    • http://jufebiwewizeza.rf.gd/ridivi.pdfIn PDF document text
    • http://kotalozobazad.rf.gd/24158213008.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_b812593804104780ba243d4d68e377a8.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_cc847a545e474d589a06b9fa5ad2b8e3.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_83074ab4e92a49b294768c2e29180608.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_b48e22b094e94f9995e0917266075633.pdf?index=trueIn PDF document text
    • http://jogulele.epizy.com/audio_visual_methods_in_teaching.pdfIn PDF document text
    • http://gupupofof.rf.gd/tadelis_game_theory.pdfIn PDF document text
    • http://satuzolo.epizy.com/adaptive_leadership_heifetz.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016746.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16746 7240 bytes
SHA-256: 0ee612c24a8bed7fe7f7f78a2c0ac22d4737e5da4abe9b8c81b8643ac9a24cad
font_00_sfnt_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 5200 bytes
SHA-256: 58a1c300cba88b075324f1f08bc79c6bbc8e3c7c232682fb15ea0b05a4afcc05
font_01_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00011e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 11056 bytes
SHA-256: 8ab9afb69ab90d01e4ddc3dae44881446a7fdcfb51693e8a86c0f9f985198a44
font_03_sfnt_off0001434c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434C 21380 bytes
SHA-256: 6c6e90191f6aec8d636a270ad124548df3f939d8764509a5504bc7a0e041310f

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