Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83f3c575b565ae6…

MALICIOUS

PDF

82.7 KB Created: 2021-03-19 17:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f13c928039cb560d508baf889f86baeb SHA-1: 445e898d79b92cdb8612cf0404b197064438c7d8 SHA-256: c83f3c575b565ae66c41ba391569e93d15e2d1dc9c217d25705769d91edf3cb1
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an embedded URI pointing to 'ponafet.ru' suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are strong indicators of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=meaty%2527s+subaru+timing+belt+guide%25E2%2580%258F
    • http://jushq.club/desenabezesirokorupeb0pjyd.pdf
    • http://raifaisentgo.online/dinolon3365.pdf
    • https://static.s123-cdn-static.com/uploads/4465136/normal_5fce27a6d650d.pdf
    • http://hr-insider.com/42017277291gxlog.pdf
    • http://vvinorama.website/lagu_beautiful_in_white_versi_karaokeutshk.pdf
    • http://dihtyar.online/how_to_service_a_toro_snowblower9rmq2.pdf
    • https://cdn-cms.f-static.net/uploads/4378619/normal_604e67bd3c4b1.pdf
    • http://pinezotamex.getenjoyment.net/32155283062.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3cd99da6-32be-4e08-9ea1-df9f8edf028c/unidad_5_modelos_de_pronosticos_e_inventarios_investigacion_de_operaciones.pdf
    • https://uploads.strikinglycdn.com/files/aefed114-f3c6-429a-bf95-de438d6661a9/gepafulos.pdf
    • https://uploads.strikinglycdn.com/files/e02878d0-27ff-4049-ad72-a62d46000931/the_game_of_life_board_game_instructions_uk.pdf
    • https://s3.amazonaws.com/nevovumowa/how_to_refill_epson_18_ink_cartridges.pdf
    • https://s3.amazonaws.com/julaxel/minecraft_bsl_shaders_1._12._2.pdf
    • https://uploads.strikinglycdn.com/files/24e7ce8d-30d4-4f26-8a11-aa22012a4a6c/what_does_an_ab_60_license_look_like.pdf
    • https://s3.amazonaws.com/firudegix/kazagelaburuvuzu.pdf
    • http://gevotuwelu.rf.gd/98705626873.pdf
    • https://s3.amazonaws.com/zonivezada/cisco_asa_5508_datasheet.pdf
    • http://pojezevosolodo.rf.gd/welil.pdf
    • https://uploads.strikinglycdn.com/files/1f0622af-0b71-4020-945a-c8a4e7a39b4b/47257357194.pdf
    • http://voturugivorajop.onlinewebshop.net/61657260285.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_off000103c2.bin
ac0a1510ae4bd3f4e85e0693669153618b48261129687e69d9fb012c78546777
pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 5428 bytes
font_01_sfnt_off00011639.bin
555016c8c2e41350aee4a9f4f8cba6095df06672adaae6aa1cd2cc94a184b09a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 10768 bytes