Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdc536f9f2c90c3…

MALICIOUS

PDF

74.1 KB Created: 2021-06-10 01:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e360fdf280045776131cf93fa974dc72 SHA-1: d40f1de0914524ae039bc615f45274e5ebfa3b01 SHA-256: ffdc536f9f2c90c3e16f99ca826728c8a029a5e2868a8c7c95ca6d45a461af40
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'allytemp.ru', which is likely a malicious domain used for distributing malware or phishing content. The document body, though partially corrupted, suggests a lure related to downloading a movie, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/pbw?utm_term=tanhaji+download+full+movie
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6048e6930c84c.pdf
    • https://static.s123-cdn-static.com/uploads/4446289/normal_6001a38cbf720.pdf
    • https://cdn-cms.f-static.net/uploads/4490132/normal_60379a88bda9e.pdf
    • https://cdn-cms.f-static.net/uploads/4393489/normal_600a5647bdbec.pdf
    • https://static.s123-cdn-static.com/uploads/4417426/normal_5fcda16e473a9.pdf
    • https://cdn-cms.f-static.net/uploads/4453740/normal_606a761b070fa.pdf
    • https://cdn-cms.f-static.net/uploads/4379968/normal_600e44db8d7c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8207c058-da93-4851-bf9a-53cb14525b5d/jalewujoxiwoper.pdf
    • https://uploads.strikinglycdn.com/files/3f02b6f8-7ae2-4db9-b252-9d8e1f80add9/henry_and_mudge_the_first_book_lesson_plans.pdf
    • https://uploads.strikinglycdn.com/files/2e6270d6-3db7-4bb2-92ae-97f80f8552df/the_temples_that_jerusalem_forgot_download.pdf
    • https://uploads.strikinglycdn.com/files/c8caf79a-87c7-4139-9651-39c8cf3d773d/zaviriruxavagon.pdf
    • https://uploads.strikinglycdn.com/files/08bbe987-04f3-4522-90f9-6a42affe98c7/25802245138.pdf
    • https://uploads.strikinglycdn.com/files/7989a2d3-2093-45ee-9357-8ab354d9d648/ejercicios_complementarios_de_segundo_grado_bloque_2.pdf
    • http://giwupiraride.pbworks.com/w/file/fetch/144726723/como_desarrollar_el_pensamiento_crtico_en_los_nios_de_inicial.pdf
    • http://bopelijexuf.pbworks.com/w/file/fetch/144449349/notematevo.pdf
    • http://sonubugu.pbworks.com/w/file/fetch/144675318/684304838.pdf
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413565/rojapebokupexu.pdf
    • https://uploads.strikinglycdn.com/files/81640e3f-b772-4f1d-9bea-b14b973e9453/weekly_meal_plan.pdf
    • https://uploads.strikinglycdn.com/files/eeca5db1-b6ca-4b0b-a06d-6e4df249bd75/order_sequence_text_structure.pdf
    • https://uploads.strikinglycdn.com/files/bcd6275d-d1ef-4c78-b514-8dcbf4f7d885/how_to_service_a_new_holland_tractor.pdf
    • https://uploads.strikinglycdn.com/files/c230d612-a722-410a-ad31-ba8c9766cd90/82810342430.pdf
    • https://uploads.strikinglycdn.com/files/9a4a5643-abcb-4b1c-81ef-96e74c154d24/lfs_6r_s2_unlocker_ip_patch_indir.pdf
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144775941/poxewaverofat.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_off0000e634.bin
c08543fa84763447117f2e3fb5495e8ece19e65f97ad02c75e458b38bfd97c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 5048 bytes
font_01_sfnt_off0000f75c.bin
da6d3d16eb7bb6f448cf053c850d44896d224bead7697aebcb50214b6e275447		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 10340 bytes

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