Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb374c905bde70e…

MALICIOUS

PDF

82.3 KB Created: 2021-03-28 13:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1dcf1f00eb790bcd988a0c1a037b40d SHA-1: 44b9742405440a10f542df83e76010976fc2f9ef SHA-256: abb374c905bde70e2d673b6cac6e8717292743605927b5f15de35dd634377878
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=mechanical+engineering+colleges+in+houston+texas
    • http://megantv.site/curso_de_inteligencia_emocional_escola_conquer_gratuitoan6iq.pdf
    • http://parhelifrl.space/fijizakilhmlv.pdf
    • http://libotopatolar.iblogger.org/ielts_writing_task_1_questions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a2cdd7ba-a122-4eaf-8afa-f1f61a3aadc4/moxijutofuzenije.pdf
    • https://uploads.strikinglycdn.com/files/fef2198b-21df-4c8a-a945-f71101d14f86/what_does_a_software_developer_do_uk.pdf
    • http://romudiforexove.epizy.com/french_ir_verb_conjugation_chart.pdf
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_4476f8d035d04bac8bc89f8f3ffe730f.pdf?index=true
    • https://s3.amazonaws.com/wobuzisibal/most_reliable_double_wall_oven_brands.pdf
    • https://s3.amazonaws.com/bulalowisu/boxelaniwisevoregaxa.pdf
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_279e9659c0ba4cf6a7a9b3ad820edadf.pdf?index=true
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_8f7d47b8e273464592e9edc0e58abb17.pdf?index=true
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_a4c7604a40fa4ae9a37babf9c12efbbc.pdf?index=true
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_5db97dd157ca406fa9d24c6f753d77ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a8937143-1a26-448a-baf3-49de6be1a7bb/laxakerenidadolivavuvavex.pdf
    • https://uploads.strikinglycdn.com/files/ef7a86e8-5d0c-4abe-a1e4-a02746f0e246/25098136614.pdf
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_fc1c536715d34d7784402ea265379c10.pdf?index=true
    • https://s3.amazonaws.com/jemisajoda/luxasozaxipipobu.pdf
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_490355aa5813499eb84887a239eda478.pdf?index=true
    • http://sexililelaweru.rf.gd/waxaziboloseg.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/chain_reaction_game.pdf
    • https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_f3558a155d8c4b8b81628134f962ae3d.pdf?index=true
    • https://s3.amazonaws.com/vedexajawo/best_photo_editor_app_uptodown.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_off00010526.bin
e3be87402308c3ae502aed79ea0743a2478db25c00329cf4c6ec1dfc81111b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 5136 bytes
font_01_sfnt_off000116aa.bin
cf8f468cf54fc1e7ac1175938acaf043817663b9c2552b992ad66fec986f2f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116AA 10848 bytes

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