Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b6c0e7ed2f8357…

MALICIOUS

PDF

87.5 KB Created: 2021-05-24 07:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd86823d377e22201a5ea64ce41693a2 SHA-1: b7c1291b28b64456534a7c0c4cf0c0e404632974 SHA-256: b6b6c0e7ed2f835756b131e2d8f027fe8f61c1a54a2ba0eb64dfb91863bb4980
96 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, with a primary focus on a URL that appears to be a lure for movie downloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to generate traffic or distribute malware. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=aashiqui+2+full+movie+download+hd+720p+bluray
    • https://static.s123-cdn-static.com/uploads/4388177/normal_5fca3134772cd.pdf
    • https://zifikatulonajo.weebly.com/uploads/1/3/4/4/134494345/6464d8f175d0f.pdf
    • https://duguzimelape.weebly.com/uploads/1/3/4/6/134666192/4588165.pdf
    • https://cdn-cms.f-static.net/uploads/4451563/normal_603127c7d3b41.pdf
    • https://dudunubute.weebly.com/uploads/1/3/4/1/134132035/jutekobojizej.pdf
    • https://static.s123-cdn-static.com/uploads/4365583/normal_60091a4d377c0.pdf
    • https://cdn-cms.f-static.net/uploads/4456398/normal_5fd96f5330246.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xukanomarexumu/android_developer_guide_components.pdf
    • https://s3.amazonaws.com/migivewuwe/yamla_pagla_deewana_3_free.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/58091043548.pdf
    • https://s3.amazonaws.com/sajatesawodiji/calculating_ecological_footprint_worksheet.pdf
    • https://s3.amazonaws.com/nevovumowa/drill_guide_for_hand_drill.pdf
    • https://s3.amazonaws.com/girilifawuxi/emule_kad_servers_2018.pdf
    • https://uploads.strikinglycdn.com/files/cba085e3-7d45-427b-a65b-ffeca3b0566b/fifth_grade_persuasive_essay_examples.pdf
    • https://uploads.strikinglycdn.com/files/78d15026-dd05-4921-bbd4-4c5bf6d30409/65852387819.pdf
    • https://s3.amazonaws.com/wovedukevikov/definicion_de_artes_plasticas.pdf
    • https://uploads.strikinglycdn.com/files/0791094e-fb79-4340-8619-4e6f5c4adc64/butterball_deep_fryer_operating_instructions.pdf
    • https://uploads.strikinglycdn.com/files/fcdcf404-3b2c-4e66-a2b9-c2074b31961c/graphing_quadratic_functions_worksheet.pdf
    • https://s3.amazonaws.com/fusidejebi/descargar_aplicaciones_de_paga_gratis_para_android.pdf
    • https://s3.amazonaws.com/fejakixoweka/nested_ifs_google_sheets.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80e.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 6744 bytes
font_01_sfnt_off000108f3.bin
6ce49ee759764fe4c242f7e6d45966062fb05c1211a7d2bd1ed434d26d86a75c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F3 6144 bytes
font_02_sfnt_off00011dc7.bin
aeee9b2fd577c594ede074a7e3493832e024aab8d381a7c1d16527c2e435dd06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 2252 bytes
font_03_sfnt_off00012805.bin
c68e74a2423b6728a85abd5d267383e0c0f71fa9f309d25578071af3d85e9356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12805 11084 bytes

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