Malicious PDF — malware analysis report

Static analysis result for SHA-256 799b4be17ac2080f…

MALICIOUS

PDF

79.0 KB Created: 2021-05-23 04:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6289cbbb33ad7f56044cd775c6155a62 SHA-1: de7e6ed22e560a84eee048dc9fe42c8b07759a67 SHA-256: 799b4be17ac2080f56678252e5511e8b50c2e876fdf3e39642442fdaa1a3f6f5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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.
  • 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://vilenefex.ru/strik?utm_term=preinscripciones+secundaria+2019+cdmx PDF link annotation
    • https://vuxuminitemup.weebly.com/uploads/1/3/0/8/130874085/nixefeda-watojonoxu-kapubuzox-kisipenezagime.pdfIn PDF document text
    • https://ramowofotaro.weebly.com/uploads/1/3/1/6/131607053/nizimozezovaziwalowu.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/021f795d8.pdfIn PDF document text
    • https://fajalosi.weebly.com/uploads/1/3/4/9/134901252/moxin_golorusipuk_mukamabeki_wamemaj.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/7576528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lusabifef/justin_bieber_selena_gomez_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63fac65-eccf-4275-a82b-9d324da62a9a/letra_de_haz_llover_abre_las_puertas_del_cielo_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcd8231-3ab6-460d-bd63-faf8a403b25c/dometic_rm1350_light_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb964ae-89e7-4716-9404-49d5bfcc7e76/the_lord_of_the_rings_2003_full_movie_in_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fbba40-5e28-42ec-9dee-d8079d8d89a7/valhalla_long_hive_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/bioinorganic_chemistry_notes_for_csir_net.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/35096872824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1d18ea-0b02-40b2-b41b-61bb092531bd/84458704800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28813563-f2aa-4c12-a0b7-d426b5d4d602/what_causes_adrenal_gland_deficiency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe28e84d-c58d-4d2f-8482-625909c2340e/sharp_air_conditioner_portable_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedac865-c88d-4786-85dc-eae66a55fdf7/movie_maker_tool_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/licence_pro_informatique_alternance_paris.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/35809010300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e93993a-2880-47c3-811d-1459b2e4aa01/intex_sand_filter_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2d4725-bd5f-4eeb-aa70-e39a45a812c3/pidifukilegefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62343311-9988-4321-b1d1-9fa347a9f306/draw_tite_brake_controller_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/spatial_filters_for_smoothing_and_sharpening.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_off0000f0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 5740 bytes
SHA-256: 8203bda3ae10ea4836772c793bdf0e318ad8dac9237ef6a59212d912d216fc72
font_01_sfnt_off00010460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 12644 bytes
SHA-256: 5962e5e9563dc73136bdf5df4f1ab2481b8744b55752c14b75c3ff8a7327db88

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